Here is the full list of all 37 Zombie Tycoon 2: Brainhov's Revenge achievements.
Obtain a rating of 5 brains in any chapter of the campaign
Slaughter 500 humans
Complete chapter 5
Find all trophy parts in chapter 4
Kill 200 feral zombies
Complete chapter 2
Find all trophy parts in chapter 2
Complete chapter 1
Find the trophy in chapter 1
Slaughter 100 humans
Obtain all Zombie Tycoon 2: Brainhov's Revenge trophies
Check out every page of the Codex
Find all trophy parts in chapter 3
Defeat Bearhug with 75% health or more
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 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
Kill 100 shambling zombies
Kill 500 shambling zombies
Kill 1000 feral zombies
Use all abilities of each Monster at least once