Here is the full list of all 14 Three Dead Zed achievements.
Beat the game under an hour
Died less than 30 times completing the game
Complete challenge stages in under 45 minutes
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.
You found a secret message.
Yep - That's a cat with a tinfoil hat.
Your escape begins here. (Start office 1)