You've found Da Vinci's lost blueprints of the ornnithopter
Rising in one of the elevators will take you to a small platform, which will be a unique flying boat "Vault Guardian". With his winning epic konsumabl "Da Vinci's master plan" (+5 Willpower). You also get Easter Eggs Achievement (1/13) "Legacy of the genius" after the absorption of the drawing.

You've found Wilhelm Tell's crossbow
At the same site where you met "Vault Guardian", in the farthest corner is a few boxes, breaking that, you get a unique piece of "Tell's appleshooter bow". It can be as ipolzovat Relic for your generals. You also get Easter Eggs Achievement (2/13) "Shoot'n tell".

You've found the hidden prison section
In one of the cells has "Beggar", which, if you give him 100 coins, will talk about the passage into the secret location "Holding Facility".

You've found the Mask of the Cannibal
On the second floor in one of the cells sitting "Dr. Lecter". Release him to meet later in the third chapter. Seeking mask is in inconspicuous box in his cell.

You've found Dr. Jekyll's tincture
On tetem tier in one of the cells sitting "Ivan Stephanovic-Hyde". Let the victim of experiments at will and he will carry the final roof. After the death of this travesty of Hulk winning epic konsumabl "Dr. Jekyll's tincture" (+5 to Body, +25 Hit Points).

On this map you will stumble upon the remains of the caravan and looted the body of the leader of the caravan. If you search the body, you will then be easier to bring out into the rat-robbers in the same location after the passage of the mines. Anything else is not affected.

You've found Mushroon Expert Certificate
On the first turn of the serpentine you will see a windmill with a sign "Mushroon Expert". The owner was lying a little further down the road (it is highlighted in blue bird). On the corpse you will find "Mushroon Expert Certificate". It can give "Dr.Dampf" in your logs (remember, he complained that no one appreciates?). Get a few thousand gold and listen to funny dialogue. For finding the certificate, you also get Easter Eggs Achievement (3/13) "Legacy of the fool".

You've found the woodcarver's treasure
Somewhere in the middle of the road between the two windmills sticking "Rukh Pole". Think of it must be something to fall out, but I can not drop anything. Clicking on it you will get Easter Eggs Achievement (4/13) "Two birds, one pole".

You've found Don Qujote's lance
If you look closely at the second windmill, it becomes evident that the spear sticking out of it - it's a spear of Don Quixote. It feels like the developers in the second part have lost all sense of proportion. Spear can be used as Relic for your generals.

You've found the scarecrow's treasure
A little south-east of the second windmill on a cliff sticking scarecrow. From it falls epic trophy "Harpy Matriarch Feather".

You've found a goldfish
Skip frozen goldfish is difficult - it is next to the bridge to the east of the second windmill. It is useful to you only in the second chapter. For grabbing fish you get Easter Eggs Achievement (5/13) "Mirelite Miracle".

You've called forth the giants with the giant gong
In the abandoned village right next to the stationary portal is a large gong. Bryaknite into it and you will attack a group of giants led by the matriarch.

You've helped Woody avoid people accusing him of being a ghoul
or
You've revealed that Woody is a ghoul
In the same village you will find a ghoul named "Woody". The poor man thinks that he is not a ghoul, and he just skin problems, which is why all confuse it with a ghoul. He will ask you for a hat and a little bit of money on clothes. If you offer him something to eat, the true nature ghoul take up and it can be killed. With the carcass falls epic konsumabl for eating you get Easter Eggs Achievement. However! If you kill him now, you will not find it in the third chapter, and shall not find there all Hidden Content. So now give him the money and let him go.

You've found the Dungeonkeeper's armour
To the east of the village, near the wall of a house, you will find an altar. Feel free to take away from it sets bib "Dungeonkeeper's Armour".

You've looted the body of the dead young hunter
Again, to the east of the village will be "Adept of Perun". He wants you cleared the area of monsters and destroyed the idol, as your predecessor, seems to have screwed up. Agree. In the course of the mission, you will find the carcass of a young underdog.

You've saved the bomb expert
After the release of "Cold Caverns" walk along the eastern road. You stumble upon a camp rats (do to them as commands conscience), and at the end of the road to the other side of the collapse, which you had to crawl. Find "Injured Man", crushed by landslides stones. This individual will ask you to lay explosives, so that he could escape. Minesweeper of it ... disposable. Therefore, the advice of Lady Catherine's - in this case, the hero of the occasion will not appear smeared on the ground even bloody bed, and you will get Easter Eggs Achievement (6/13) "It was a blast!".

You've found the Afterlife ring
Carefully inspect the very first cave and the remains of the set you will find a clickable skeleton from which the winning epic ring.
You've evicted the domovoy from the minecart

The third cave, before descending down to a small bridge leading to a small ledge, over which hangs a clickable trolley. For abuse of brownies you get Easter Eggs Achievement (7/13) "Eviction enforcement".

You've looted the body of the grey withard
After descending down into the cave, where you will meet "Vasily Mechanov", turn to the east, and on the broken bridge will find the body "Grey Wizard". As I said earlier - in the second game developers have lost all sense of proportion. Search body magician to get Easter Eggs Achievement (8/13) "Grey Treasures".

You've found a Rare ore
At the southern entrance of the cave with "Vasily Mechanov" you will find the skeleton of a dwarf next to mine some ore. After the examination, the carcass and some dialogue would undertake the development of the field. You are out 2 "Epic Master Rune Fragment" and open Easter Eggs Achievement (9/13) "A smith's dream".

In the northern part of the map you will stumble upon a giant camp merchant "Mr. Bellow Smash Jr.", which in the range of a bunch of quests and epic stuff. Here is a list of notes:
"Machine Part" - the application has not been found.
"Rusty Bomb" - the application has not been found.
"Electric Coil" - application was not found.
"Gloomy Planet Guidebook" - the application has not been found.
"Orichalcum Ore" - the application has not been found.
"Engraved Iron Key" - come in handy at the end of the third chapter.
"Swamp Lily" - can be attributed fortuneteller "Saffi" in the Secret Lair. Get an epic amulet "Saffi's Improved Medallion".
"Griffon Egg" (+5 to All Resistance)
"Suspicious mushroom" (+5 to Luck) - for his eating of you get Easter Eggs Achievement (10/13) "Who cares whether it's poisonous?".
"Zacapa Rum" (+ 5% to Potions Efficiency)
"Fifth Element" - the epic essence, similar to the one that was in the first game.
"Ring of Guidance" - one of the most tedious of secrets in the game. For now, just unlock all of its properties, and you will need it is already in the third chapter.
"Jade Dobryna Figurine" - simply epic amulet.
Well, after Hidden Content location:

You've found all three Moonstones
You need to collect three "Moonstone". The first is right next to the entrance to the location - just examine the body with a question, and you get a stone with a very aggressive ice spirit. To find the second stone, go to the south of the first, cross the bridge and see the heels of bodies on the ground. The second stone on one of these nameless carcasses, and already have to deal with a whole bunch of ice spirits. Third stone you will be given if you agree to complete the quest "Adept of Perun". This time you have to close the "Stargate" in the measurement of ice spirits. By the way, in a box near by the gate, you will find the Relic for your generals "Daedalus Manuscript". At the beginning of the second chapter of "Dr.Dampf" be able to do three stones epic essence. And for finding all three stones you get Easter Eggs Achievement (11/13) "Lunar collection".

You've found the Dungeonkeeper's amulet
To the east of the village of ghosts, if you go across the bridge will be a small parking local Aboriginal people. Next to their leader will be an altar heaped skulls - take away from it sets the amulet "Dungeonkeeper Amulet".

You've found the runestone from the old well
All in the same settlement in a cage sitting your old friend trader from the first game. Now, pay attention! To find a "runestone" you first need to tell the leader, you will understand the spirit of the (in any case, do not touch the well to it!), Then go to inspect the well. You will find that there is not enough of a stone in the ring (apparently our old friend dug him out), then you need to go in search of the enchanted cobblestone koy is in a makeshift camp merchant (in the south-east from the parking lot Aboriginal). After finding the stone trudge back to the well. Further choice has nothing on is not particularly affected.

You've found the Spiritwalker's relic
In the village of ghosts you will be given a quest to break the curse. Actually, it can be done in two ways: to find Relic and return it to the Aborigines or kill all Aboriginal and break their totem. Relic is not difficult to find - it's located in a pile of bones in the parking lot of the giants. Parking itself is in the southern part of the map - there is a narrow path. I did not check whether or not to leave it to itself in the negotiations with the natives, or you can give. I would prefer to solve the problem of reducing livestock natives.

You've found the Masterfully Botched Armour
Next to the second stationary portal stick two stone heads. They povorchat grinds on hunters, after which one of them will throw an epic Chestguard "Masterfully Botched Armor". You also get Easter Eggs Achievement (12/13) "Masterfully Botched Gift".

You've proven the existence of the yeti
In the camp of Aboriginal where you need to remove the curse from the ghosts are near the totem drums. Tap on any of them until they cease to stand out and get you prove the existence of Bigfoot.

You've defeated the Black Knight
To the west of the second stationary portal, if you go across the river, you will stumble upon a piece of the broken bridge (it is to be seen from the first Aboriginal camp). Here you will find a "epic duel" with armless and legless Black Knight.

You've won The Rock from the stone heads
According to the story quests you will need to answer the questions the group talking stone heads to pass on. If you answer all the questions correctly, you will get the essence of the epic "Greater Petrified Essence". If we take as a starting point that head, that gave you the job, then clockwise correct answers are:
Stone, because it the hardest.
That would be a mountain.
Wet stones.
The mountain.
A mountain.
Very monotonous, is not it?

You've found the secret area in the Subterranean Incursion
Conditions for opening secret locations: two waves in succession or one monster does not have to go to the database.

You've found the secret area in the Invasion of the Rat-Things
Condition of opening a secret location: kill 300 monsters using traps.

You've had Koschei's Tear made
At the beginning of the second chapter, if you have collected all three "Moonstone", an alchemist in the den will make them the essence of the epic "Koschei's tears".

Attention! At the beginning of locations worth "Curious Idol" - do not touch it. It is associated with a secret "Ring of Guidance". Leave it to the third chapter.

You've found the Emerald Lantern
On the north of the map there is an open area with lots of enemies. In the midst of it, and will stick with the desired column "Emerald Lantern". The lantern can be ipolzovat as Relic for your generals
.
You've summoned the chimera by turning the statues
In the southeastern part of the map is a small podium with four small statues of chimeras on the edge. Turn all the statues' heads to the center of the podium, and you will come out elite "Chimera Elder".

You've found the chest full of essences
In the location immediately after the first bridge on you, among other opponents attack elite "Chimera Elder", from which the key will be thrown out. This key opens the locked door in the northernmost part of the map. Behind it you'll find something like a warehouse. Among the usual boxes and barrels have "Old Crate", revealing that you get a bunch of essences and a couple of enemies.

You destroyed the Alpha Prototype
In the eastern part of the map you will find a non-adversarial "Alpha Prototype". If you start a dialogue with him, you will hear a question from the iconic Terminator. Answer him: "My companion? Who knows? Maybe she is". Then you can get rid of the copycat.

You've stolen the treasure of the Thieve's Guild
On the north of the map, east of the entrance to the Foundry, nook and cranny has reached the end of which you will hear a conversation between two types of thieves' guild. Treasures in one of those standing near the barrels.

You thawed the goldfish and made a wish. (Well someone did anyway ...)
In the northern part of the map you will find a small "Kettle" - a vat of molten steel. If you picked up a goldfish in the first chapter, you can unfreeze it here. Unfortunately wish to "world peace" you do not succeed, and you will get a useless quest item "Diamond Earring".

You've found the strangely scientifuc looking Resistance sign
If you go at the eastern road from the platform with the quest "Drawing Board", then immediately after the bridge you will see a yellow symbol Half-Life on the wall. Click on the "Loose Pack Bale", to listen to Lady Catherine's indignation.

You've found the T95 Chip
Just south of Half-Life symbol on the grid is "Shredder Wreack". Click on it to get the epic konsumabl "T95 Chip" (+10 Willpower).

You've found a secret area in the Foundry
On the map there are passages in the three smaller locations. Apparently there is a view that that nahodistya center of the map, - "Packaging Area". Lady Catherine yet to comment on the slightly priokrytoy door.

You've found the Photon Blade Essence
In the most "Packaging Area" near the entrance hanging droid "Arthur Detour" :). Click on it to get epic essences "Photon Blade Essence", and to hear a reference to Star Wars.

You are one of the few who survived a mass squirrel attack
Approximately in the center of the map, near the sewer pipe, you will find a group of neutral protein. If you kill a couple, you will be attacked by a wave of rabid squirrels killer.

You found the secret area in the Invasion of the Inhuman Regiment
Condition of opening a secret location: build 20 traps.

You've found the secret area in the Maze of Blades
Condition of opening a secret location: Build 6 Salvage Recycler.

You've found the secret area in the Caverns of Steel
Condition of opening a secret location: Build and fully improve the 5 traps. You can build 4 Salvage Recycler and one Rocketous Automated Sentry - they are traps the maximum level.

The beggar far left of the map here will talk about his master, a consulting detective who fell to his death while fighting his nemesis. Meeting the beggar is one of the secrets for the chapter. "I just had this frightening idea.... No, he couldn't have been a domovoy."

over the bridge from the beggar In this side street you'll encounter up to three murderers: Woody (if you helped him on Thunderhead Mountain), Dr. Lecter (if you freed him from his cell in the Holding Facility), and Jack the Inkripper (always). All three murderers are secrets for the chapter.

At the far back of the map on the right When you reach this spot on the rooftops, you'll see the Van Helsing signal, which is one of the secrets for the chapter. "Our vampires are way too obsessed with bats."

go over the first spiders bridge and take the bridge straight ahead of that and on the island You'll find the Dungeonkeeper Trophy on the altar here. Picking it up is one of the secrets for the chapter.

If you previously picked up the other Dungeonkeeper items in the game, then Yugaroth will get angry at you for disturbing his altars, and he'll summon you to the Gorge of Eternal Peril, where you'll have to fight him plus a mess of grubshrieks. Yugaroth won't be any more difficult now than he was in the Giantwoods, and so the battle should not be too difficult. Afterwards, you'll find Arches of Peril that you'll be able to loot for some combination of runes, scrolls, and essences. Collecting all of the Dungeonkeeper items is also one of the secrets for the chapter.

On the far right of the map You'll find 11 grave markers here, all for musicians who died at the age of 27. If you read enough of them, then you'll get attacked by five wights. Reading all of the markers is one of the secrets for the chapter.

Directlly north of the grave (over 2 brdiges) their will be a scarecrow When you approach the scarecrow here, you'll get attacked by several vila veterans. Surviving this attack is one of the secrets for the chapter.

While you're in the Giantwoods, you'll meet a merchant named Mr. Bellow Smash Jr., and he'll sell you a strange item called the Ring of Guidance. The ring has several bonuses that need to be unlocked (by dealing damage), but instead of regular bonuses they're actually instructions:

Touch the Idol on the Crystal Workshop
Walk to the altar in the Testing Facility
Throw this ring to the ground; then take it back
Find the wraiths in the Wormwood Chasm
Kill the wraiths but spare the leader

The ring has a minimum level of 35, so even though you can buy it in the normal campaign, you can only follow the instructions in the veteran campaign. In particular, you'll only be able to interact with the "curious idol" in the Crystal Workshop in the veteran campaign.

One important thing to know is that you have to buy a new ring for each character who you want to have follow the instructions. You can't have one character unlock the instructions and then use the ring with other characters. You have to have one character buy the ring, unlock the instructions on the ring, and then use the ring when following the instructions. Any mixing and matching will break the sequence.

To receive the reward that the ring is guiding you to, this is what you'll need to do:
Touch the curious idol in the Crystal Workshop. You'll find it near the entrance. You're not required to be wearing the ring for this, but you should have it with you.

Go to the altar in the Testing Facility (where you find the Dungeonkeeper Gloves) and drop the ring and then pick it back up.

Go to Wormwood Chasm and defeat the wraiths that you find there, but spare the wraith leader. The wights in the area are unrelated and you can kill them to your heart's content. You'll find the wraiths on a small island on the northern side of the map.

If you kill the wraiths without killing the wraith leader, then an ink portal will appear. It will take you to an island to the northwest, where you'll get attacked by several kikimoras and various other spiders.

After the battle you'll find the corpse of a domovoy next to one of the buildings. It will supply you with a nice selection of random loot, likely including multiple unique items.