Pew Pew Pew - Craft Meteor armor and Space gun
Now that's what i call OP! - craft the terra blade
I'm a millionaire! - obtain a platinum coin
Spooky Scary Skeletron - Defeat Skeletron
Eye-ce to meet you! - Defeat Eye of cthulu
Hungry Hungry Worms - Defeat Eater of Worlds
Ewwwww - Defeat wall of flesh
Delicious brains! - Defeat brain of cthulu
Zombie Slayer Extrordinaire - kill 100 zombies
Eye-xterminator - kill 100 demon eyes
Round 2
Gotta Go Fast! - Obtain hermes boots
I believe i can fly... - obtain rocket boots
I believe i can touch the sky... - get to the top of the world
Welcome to 2015! - Craft a Hover board
What a couple of Eye-sores - Defeat the Twins
More than meets the eye(socket) - Defeat Skeletron Prime
More like, the Destroyed! - Defeat the Destroyer
Rock And Root! - Defeat Plantera
Swimming with the fishies - Defeat Duke Fishron
This is Halloween - Complete the Pumpkin moon
Deck the Halls! - Complete the Frost moon
ew, i don't like em, i don't like goblins. - Defeat the goblin army
why is the rum gone?! - Defeat the pirate invasion
Say hello to my little friend - Buy the Minishark
Not so "mini" anymore! - Craft the Megashark
Round 3 Here's a quick image of the Eye-ce to meet you achievment, because why not.
Achievment with overlay
Overlay
Raw achievment
Will post more when i think of them.