Here is the full list of all 12 Zombeer trophies - there are 8 bronze, 3 silver and 1 gold.
Finish the game in Normal difficulty
Complete the game on Hard difficulty
Finish the game in Easy difficulty
Complete the game without getting zombified or drunk
Complete the game using only the dildo
Find all the collectibles
Find all the developer diaries
Crush the president in the stadium
Find all the “men in thongs” figures
Find all the cover pages of Jessica
Get all the sniper rifle parts
Grind up three zombies in the turbine