There are a maximum of 88 Terraria achievements worth 1,661
4,058 tracked gamers have this game, 191 have completed it (4.71%)
Defeat the Brain of Cthuhlu, an enourmous demon brain which haunts the creeping crimson.
Unlocked by 1,453 tracked gamers (36% - TSA Ratio = 1.66)
Do you have a question about this achievement? Please post it in the Terraria Forum