This page lists the Achievements by Game that you may add to your Achievement Trading Profile.
If you're chasing an acheivement that's not listed you can request it's added to the database.

If no game is selected the Top 5 Most Wanted Achievements are displayed.
Filter by Game:

Seriously ... - 50
Kill 10,000 people in versus ranked match total
[117 whores] - [add to my profile] - [0 sessions] - [create session]

Two for One - 5
Score a Double Kill with a single spartan laser shot in a ranked free for all playlist (Online).
[99 whores] - [add to my profile] - [0 sessions] - [create session]

Overkill - 5
Kill 4 enemies within 4 seconds of one another in a ranked free for all playlist (Online).
[94 whores] - [add to my profile] - [0 sessions] - [create session]

Maybe Next Time Buddy - 5
Board the same vehicle within 10 seconds after being boarded in any free for all playlist (Online).
[81 whores] - [add to my profile] - [0 sessions] - [create session]

1,000,000 Online Credits - 30
Earn 1,000,000 "Online Credits" from Tournaments and Career races.
[78 whores] - [add to my profile] - [0 sessions] - [create session]

Achievements recently added to GSW database:
'Top of the Scrap Heap' from Transformers: WFC worth 75 gamerscore 'Real Nasty Habit' from Aliens vs Predator worth 50 gamerscore 'Spoiler' from NCAA® Basketball 10 worth 25 gamerscore 'Firefight: Windward' from Halo 3: ODST worth 10 gamerscore 'Firefight: Alpha Site' from Halo 3: ODST worth 10 gamerscore 'Firefight: Chasm Ten' from Halo 3: ODST worth 10 gamerscore 'Firefight: Last Exit' from Halo 3: ODST worth 10 gamerscore 'Metropolis' from Carcassonne worth 25 gamerscore