Here is the full list of all 40 Overlord: Fellowship of Evil achievements.
You defeated the Trolls.
You helped Ricket fix her forge.
Kill a "boss enemy" in a multiplayer game.
Complete any quest in online multiplayer, with at least one other player.
Complete the prologue tutorial quest.
Have 12 of your minions active at a given moment.
Summon minions 50 times.
Gain 100% of the crowns in one quest.
You completed the prologue.
You completed Act 1.
You completed Act 2.
You completed Act 3.
You crashed the banquet.
You introduced the peasants to the zombies!
The plot thickens.
Gain 100 crowns in-game through winning phases .
Kill 50 sheep.
Obtain all weapons for all characters.
With four players, each summon at least 4 minions at the same time.
Receive the healing effect of blue minions 500 times.
Summon Green minions to assassinate 50 enemies
Kill 100 enemies with explosive red minions.
Kill 50 enemies with defensive brown minions.
Summon minions 250 times .
Summon minions 500 times .
Receive loot from minions 250 times.
Complete/win 100 traversal states within the time limit.
Buy all of the upgrades for one minion colour.
Buy all of the upgrades for all minion colours.
Buy half of one character's statue upgrades.
Buy all of one character's statue upgrades.
Buy all statue upgrades for all four characters.
Knock 20 enemies off the side of the world and into the abyss!
"Careful, we already lost one Overlord down there! I wonder what happened to him?" - Gnarl
Complete a quest in local co-op with at least 2 players present.
Finish a quest in first place in multiplayer.
You defeated Cedric
You defeated Clarissa
You defeated the Void Gazer
You defeated Sparkle.