Here is the full list of all 32 The Trivial Dead achievements.
Win a game of multiple waves with all team members alive.
Get your first killstreak.
Answer a question correctly with only one second remaining on the clock.
Wait for a Hint.
Kill all zombies in one round of shooting.
Use a 50/50 killstreak.
Use a Cheat killstreak.
Start a game on Easy difficulty.
Win a game with Art & Leisure as your best subject.
Answer a question with only one second remaining on the clock.
Miss 10 zombies, but manage to hit one thanks to Lucky Shot killstreak.
Take 20 seconds to answer a question and get it right!
Start a match in Endless mode.
Use a "Lucky Shot" achievement to avoid all misses in a round.
Kill 30 zombies with grenades in one match.
Start a game with Brutal difficulty.
Win a game with Brutal difficulty.
Win a game with History as your best subject.
Win a game with Geography as your best subject.
Win a game with Science & Nature as your best subject.
Win a game with Sports as your best subject.
Win a game with People as your best subject.
Win a game with Entertainment as your best subject.
Complete a whole game without getting a single question wrong.
Kill a total of 500 Zombies.
Kill a total of 1000 Zombies.
Kill a total of 2500 Zombies.
Get 20 killstreaks.
Get 50 killstreaks.
Kill 15 zombies with grenades in one match.
Kill 10 zombies in End game.
Kill 20 zombies with a machine gun in one game.