Here is the full list of all 14 Three Dead Zed achievements.
Complete challenge stages in under 45 minutes
Died less than 30 times completing the game
Beat the game under an hour
Well...not quite yet, but you're looking good!
Took 5 dangerous paths out.
Found all secret messages
Found all Potato Boys.
Kill 100 Civilians
Beat the game. Unlocked Challenge levels.
Died 100 times
Found a secret room. Shhh.
Yep - That's a cat with a tinfoil hat.
You found a secret message.
Your escape begins here. (Start office 1)