Here is the full list of all 37 Zombie Tycoon 2: Brainhov's Revenge achievements.
Complete chapter 1
Slaughter 100 humans
Obtain all Zombie Tycoon 2: Brainhov's Revenge trophies
Check out every page of the Codex
Find the trophy in chapter 1
Complete chapter 2
Find all trophy parts in chapter 2
Find all trophy parts in chapter 3
Find all trophy parts in chapter 4
Defeat Bearhug with 75% health or more
Complete chapter 5
Find all trophy parts in chapter 5
Find all trophy parts in chapter 6
Complete chapter 6 without deactivating Braintrust
Find all trophy parts in chapter 7
Complete chapter 7 without destroying any cooling shafts
Complete chapter 8
Find all trophy parts in chapter 8
Defeat Albotenstein with 75% health or more
Obtain a rating of 5 brains in any chapter of the campaign
Obtain a rating of 5 brains in at least 4 chapters of the campaign
Obtain a rating of 5 brains in every chapter of the campaign
Win a multiplayer game with Tycoon
Win 10 multiplayer games with Tycoon
Win a multiplayer game with Brainhov
Win 10 multiplayer games with Brainhov
Transform zombies into each of the 6 archetypes in one multiplayer game
In multiplayer, launch a Dead Rush of at least 20 zombies with Tycoon
In multiplayer, launch a Dead Rush of at least 40 zombies with Brainhov
In multiplayer, reach level 4 with each Monster
Kill a redneck in multiplayer
Slaughter 500 humans
Kill 100 shambling zombies
Kill 500 shambling zombies
Kill 200 feral zombies
Kill 1000 feral zombies
Use all abilities of each Monster at least once