Wake
Complete chapter 1.


After getting through the big room with zombies, where you have to turn off the light and open gate to get further, there is the end of chapter one.

Escape
Complete chapter 2.


This chapter ends as you go through the barnacle room for the seconds time and jump out of the sewers.

Animus
Complete chapter 3.


Third one ends after going through open area you get to by gravity jumping out of sewers.

Terminus
Complete chapter 4.


After you kill all 3 striders the game ends.

Catch em all
Find and decode all qr codes.


First two codes are on the right wall just as you are entering the building for the first time.



Next code is bit further down the coridor, lit up by the spotlight.



After you continue through the level and down the manhole, just as you turn around there is next code.



Further down the canals there are another 2 codes above adn under lambda sign on a board.



Last 2 codes are in big room with bunch of zombies on lower floor.

Gravity jump
Use a special weapon to gravity jump.


First gravity jump you have to do is right after you get the gravity gun.

Metroidvania
Find a way to get the magnum revolver.


After gettin the gravity gun and returning to room with barnacles, revolver is hidden behind the locked fence, that you now can blow open with gravity gun.

Slicer
Cut a zombie in half with a large object.


Easiest place to get this one is right after you drop down from the sewers at the beginning of chapter 3. Just hit the hanging steel beams with gravity gun and they should smash up the slow zombies.

Scholar
Find all journals.


First journal is in the room with beds right at the start of the chapter.



After falling down from the vents, next journal is on the floor near teh table with incinerator head just as you turn around.



Third journal is near the health stations in the room where you get the gravity gun.


Final journal can be found on the table in big open area just before last chapter.

Reunited
Reunite two little gnomes.


First gnome you can find in the firing range for the gravity gun. Grab him and don't lose him.


After finishing the encounter with zombies and bursting combine lock leave the gnome in room which you need to gravity jump out of to continue.


As you gravity jump out of the sewers second gnome is in the corner next to the exit.


Smash the supply box open and there will he be.


Take him back down to the sewers. to where you left the first gnome, and that's it for the achievement.

Strider Smasher
Smash two striders with shipping containers.


Timing for this one is little bit harder but if you quicksave just as the first strider appears and then another quicksave after succesfully smashing the first strider with shipping container, it shouldn't take long. Here are the 2 shipping containers which you break free by shooting them with gravity gun.