I list of fun achivements that you can try yourself or something, cookies to those who complete them.

Bully: Pick on someone, try to kill them 10 times in a row.
Traitor: Get over 10 kills on one team then switch to the other team and get 20 more kills.
Sabouteur:Grief your own teams defenses (warning, I will not be responsible if you get kicked :D).
Demolition: Destroy 5 of the enemy teams structures.
No Building Allowed: Destroy 10 atemps of player who are trying to build non-strategic structures e.g: Houses, statues etc.
Meat Shield: Use a friendly player as a meat shield :D.
Happy Camper: Take over an enemy built house (that has been built by a builder who is not fighting normally) and don't let the enemy back in.
Target Practice: Get Killed 10 times in a row without getting any kills.
Trigger Happy: Fire a total of 1500 bullets.
Commando: Get 10 melee kills.
Commander: Cap the intel 3 times.
Troll: Piss someone off IG.
Faker: Change your name and pretend to be someone else e.g bcoolface, Frosty etc.
Raze It To The Ground: Level/Grief the whole map into a flat map.
Noob: Complain about everything.
Moddifer: Make a mod for Ace Of Spades.
Kill Hog: Have 50 or more kills than anyone else in your team.
Explorer: Traverse the whole map.
Ninja: Sneak into enemy lines, take out people, steal the intel and return to base.
Like a BAU5:Quote "Like A Boss" after every 5 lines you type in one game.
DERKA: Play a game of DERKA.
Suicider: Suicide.

New!:
Rambo: Cap all the intels in a round.
I'm getting tired of how much you suck: Die 50 times in one match.
I'm gunna make a thread about this: Get kicked for no reason.
Homegrown: Build a custom map.
[Server timeout or mismatch map transfer fail]: Host a server.
DON'T DO IT: JUST DON't, FOR THE LOVE OF GOD!
Noble sacrifice: Cook a grenade until it takes out you, and three enimies.
Cross Dresser: Pretend to be a girl, and do girly stuff, IG.
BOOM! HEADSHOT!: Get 100 headshots.
IT'S OVER 9000!: Play the game for 9000 minuites.
Trap Master: Trap a player in blocks.
Griefer Patrol: Stop 20 griefers.
Architect of Death: Create a gun mod pack

Crybaby: Make someone cry

Bi-curious: Build a giant penis

Deucebag: Change your name back to Deuce

Deucebag'd: T-bag someone

Try them out, if you complete them, post in this topic.
Any suggestions are welcome!