Below will be the achievements in the order you can unlock them:

Catch Em All - Find and decode all qr codes.
To achieve this, simply zoom in on the RQ using the assigned key and repeat the process for all eight of them. No further explanation needed—the video will show all locations, and they can all be found in Chapter 1.

Wake - Complete chapter 1.
This one will unlock when you finish the first chapter.

Gravity Jump - Use a special weapon to gravity jump.
Aim down with your gravity concussion gun and shoot.


Metroidvania - Find a way to get the magnum revolver.
After obtaining the Gravity Gun and returning to the room with barnacles, you’ll find the revolver hidden behind a locked fence. You can now blast it open using the Gravity Gun. Alternatively, you can get it earlier by stacking props to jump over the locked gate.

Escape - Complete chapter 2.
Story related, will unlock eventually

Slicer - Cut a zombie in half with a large object.
The easiest place to get this achievement is right after dropping down from the sewers at the beginning of Chapter 3. Simply use the Gravity Gun to hit the hanging steel beams—they should crash down and take out the slow zombies below.
Animus - Complete chapter 3
Story Related, will unlock eventually.


Scholar - Find all journals.
1st Journal: In the room with beds at the start of the chapter, 2nd Journal: On the floor near the table with the incinerator head after falling from the vents, 3rd Journal: Near the health stations in the Gravity Gun room, 4th Journal: On a table in the big open area before the last chapter.

Reunited - Reunite two little gnomes.
Find the first gnome in the firing range with the gravity gun and make sure not to lose him. After the zombie encounter and breaking the combine lock, leave the gnome near the generator. Continue until you find the 4th Diary. Smash open the supply boxes to find the second gnome, then bring him back to the first gnome.

Strider Smasher - Smash two striders with shipping containers.
The timing for this one can be tricky, but if you quicksave right when the first Strider appears and again after successfully smashing the first Strider with a shipping container, it should be manageable. You can kill the same Strider twice by reloading, or you can try to kill both Striders using the containers. There are two containers; lead the striders underneath them and shoot them with the gravity gun to smash the Striders.

Terminus - Complete chapter 4.
This one is story related and will unlock after you defeat the 3 Striders

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