Description: Parry 3 attacks in one second.

You can instantly cancel a successful parry into another parry. With that in mind, you need to pull off 3 consecutive parry inputs. The easiest way to do that is on Boss 3, or in a group fight.

Description: Launch 3 enemies with one attack.

There are three attacks with a Launch property: Heavy Punch 3, Heavy Kick 3, and Running Kick. That last one is the easiest to get this achievement with – just get in a fight with 3 guards, and slide into them. Alternatively, if you manage to get 3 guards into a corner, you can also launch them with any of the three attacks mentioned above.

Description: Stay in the radius of a radar guard for 5 seconds without being detected.

Radar Guards are encountered from level 2 onwards – they’re easy to distinguish from the other guards with the green goggles and the huge green circle around them. You’re only detected if you’re touched by the line within that circle, which moves extremely slowly.

Find a static radar guard, wait until the green line passes, then step into the circle. Once you step out of the circle, the achievement should get unlocked.

Description: Survive the destruction of Katabase 6.

Beat the game.

Description: Defeat the CEO of Orpheus Technologies.

Beat the third boss.

Description: Succumb to the depths of Charybdis.

Die during the finale.

Description: Parry the first boss’ projectile attack.

What it says on the tin. The "projectile attack" being when he throws his pickaxe at you.

Description: Deny a shot from a taser guard by shooting them with a taser dart.

What it says on the tin. Can be done in both stealth and combat.

Description: Trick a guard into knocking out two of their teammates in one fight.

This one can be a bit tricky and somewhat random. Get into a fight with 3+ guards, then just keep dodging (don't parry!) and hoping for the best.

Easiest method: Let's say guard 1 knocks out guard 2. Remember who guard 1 is, then just rough up or even break guard 3, and let guard 1 knock them out.

Description: Complete a sublevel without being spotted or entering combat.

What it says on the tin. Use tasers to disable lights and cameras, use noisemakers to lure the guards away, concussion grenades and magnets to stun them, that sort of thing. Tasers are especially powerful, though.

You can also use Critical Strike Gauntlets – when maxed out, they instantly knock out a guard without entering combat. This piece of gear is also used to complete "I guess that works".

Description: Survive a 3-guard extraction ambush without using tear modules.

Short answer: Get caught as much as possible (don't sneak attack), get into 1v1 fights as much as possible, extract at sublevels 3, or B (aka 4).

Long answer:
Elevator ambushes are based on player Aggression, which is tracked individually per layer (not sublevel). Only one ambush can happen on each layer. Activity on lower layers does not affect ambushes on upper layers.

The chance for an ambush to happen is determined by this formula:
Ascending all the way from Sublevel B gives the highest chance. And, of course, the more Aggression, the better.

The amount of guards is determined by this formula:
mostEnemiesBeaten is taken from the successful combat encounter against the largest amount of guards (over the whole save file). If you won a 1v3, the game will remember that as 3 until you win, say, a 1v4.
If your Aggression is >= 68, and this stat is 3, you will always get 3-guard ambushes.

Player aggression is increased by:

• +2 if the player initiated the fight (sneak attack)
  
• +6 if a guard initiated the fight (player got caught)
  
• +2 per additional guard in a single fight

Description: Bait out a counter from the third boss.

You need to attack the boss during her walking/idle phase (when she has her arms behind her back), and then parry/back off. This doesn't have anything to do with heat/the boss parrying you due to heat buildup.

Description: Survive New Game+.

Beat New Game+.

Description: Knock out a guard with a concussion grenade.

Concussion grenades are not lethal by themselves – you need to equip the Explosive Safety Gloves, which enable that gadget to do damage. Once you break a guard, simply toss a grenade in their proximity.

Description: Knock out a guard without entering combat.

Technically speaking, there’s several ways to do this one, and all of them include gear.

• Critical Strike Gauntlets (dropped by 2nd boss) – the most likely way to do this achievement. When completely maxed out, instead of reducing a guard’s Max HP, they straight up knock out the guard instantly. Combine with Predator Mask for greater effect.
  
• High Force Launcher – spam a guard with tasers, and they’ll go down soon enough.
  
• Explosive Safety Gloves – I guess? Technically? You can keep tossing grenades at them until they go down, sure.

Description: Win a fight against 5 guards without using tear modules.

Use cameras, noisemakers, and… well, yourself, to alert the guards and make them sprint towards you. You can also use Concussion Grenades and Taser Darts to temporarily stun guards. Kite them until you’ve got five guards in a single room.

During the fight itself, you’ve got many options for crowd control, such as any gadget that isn't a tear module, heavy and running attacks, and friendly fire courtesy of those same guards. Good luck!

Description: Reduce your Max HP to 1.

You are looking for two specific Gear items: Stealth Mesh Hood, and Bare Suit. Each of these decrease your Max HP by 1, leading to a -2 HP reduction. The achievement should pop up as soon as you equip them.

Description: Raise your total Armor Points to 7.

Another gear-based achievement. You need:

• Any Head gear with 1 armor.
  
• Grymite Armor with all 4 armor pips (dropped by 1st boss)
  
• Any Arms gear with 1 armor.
  
• Any Legs gear with 1 armor.

Description: Beat the game from start to finish without equipping any gear.

Godspeed. You can still collect gear and discard/scrap it! Don’t forget about using gadgets, too.

Description: Nice job.

Place an Electromagnet, then get stuck on it. Congrats, you've trapped yourself.

Description: Perform a stealth attack by closing the gap with a dodge.

Dodges are completely silent, and are, in fact, faster than crouching speed. This one should be easy.

Description: Equip a set of fully upgraded, modified, and repaired gear.

Self-explanatory, really. You can fully upgrade your gear once you reach the Level 3 Forge (on L3F2).

The gear needs to be:

• Upgraded to max level
  
• Not broken
  
• All Armor and Weight mods must be obtained
  
• All Armor points must be repaired

Description: Escape with a profit of 10,000 grymite.

Scrap as many pieces of gear and gadgets as possible at the Forges, get the best combat ranks possible (those affect loot drops!)

Description: Defeat the Head of Security.

Beat Trevor Grymsdottir.

Description: Defeat the Mitrik Weapon.

Beat Aren Archer.

Description: Use a taser dart to your advantage against the second boss.

The second boss' main gimmick is the metre that gets charged up with each attack - getting overloaded stuns him, and opens him up for damage. He needs to be overloaded specifically with your taser, so just keep dodging his attacks until his metre is almost filled up.

Description: Hoard 30 items in your inventory.

Gadgets are your best bet for this – however, you can also discard or scrap them, if you want to make space for gear. You might even get this one naturally.