Here is the full list of all 25 Full Mojo Rampage achievements.
Complete a quest in cooperative mode
Complete Quest 1
Pick up 1000 coins
Talk to 3 different gods in a single match
Play in cooperative mode
Complete Quest 2
Complete Quest 3
Complete Quest 4
Complete survival mode
Complete survival mode in masochistic difficulty
Pick up 10000 coins
Unlock the champion mask
Unlock all the gods
Find all the items from the library
Reach max level
Get 10 frags in a PVP row without being killed
Kill an enemy when you are heavily wounded (1% of life or less)
Get the best score in a PVP match
Kill Mandingo without being damaged
Kill Wormling without being damaged
Complete all the quests in "Hardcore" difficulty
Complete all the quests in "Annoying" difficulty
Complete all the quests in "Definitely not easy" difficulty
Complete all the quests in "WTH is this?" difficulty
Complete all the quests in "This is VOODOOOO!" difficulty