Here is the full list of all 20 Sex Apocalypse 2 achievements.
Kill 10 zombies
Kill 30 zombies
Kill 60 zombies
Kill the mutant
Unlock the first three videos in the gallery
Unblock half of the videos in the gallery
Unlock all videos in the gallery
Spend $500 on weapons
Spend $1,000 on weapons
Spend $2,000 on weapons
Open a new neighborhood
Open all neighborhoods
Find the secret toy
Find all the secret toys
Survive 3 rounds
Survive 6 rounds
Survive 9 rounds
Survive 12 rounds
Survive a round without taking damage
Get a rifle