Full list of all 7 Fallback achievements.
Finish the tutorial for the first time. At least you didn't die yet.
Ah that's it you died... Didn't take you long.
Unlock the Biochemist. Let your ennemies rot!
Unlock the Holomaster. Now you see me, now you don't!
Unlock the Plumber. What a nice guy.
Finish the game. Congratulation you did it - you saved the world.
Unlock all the perks. Fallback has no secret for you.