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
[80 whores] - [add to my profile] - [0 sessions] - [Pimp-It!]

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

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

1,000,000 Online Credits - 30
Earn 1,000,000 "Online Credits" from Tournaments and Career races.
[54 whores] - [add to my profile] - [0 sessions] - [Pimp-It!]

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