Call of Duty 4 has been out since last winter and those of you who own it have probably finished every challenge and unlocked every rank by now. So why not think up new multiplayer Achievements to entertain yourself and keep the game fresh? Here's what CB Games has come up with to change things up:

1. LOLadder - Knife five people at the top of the ladder on the "Creek" map. If I'm not mistaken, the ladder in "Creek" that leads up from the valley to the patio is the tallest in the game, making it the perfect place for a humiliating shank. As soon as they scale the ladder, slash them in the face and then listen to them bitch. Speaking of bitching...

2. Aimbot Activated - Get ten people to accuse you of hacking. Without actually hacking, of course. If you've ever had luck with shooting enemies through walls, you've probably been accused of wall-hacking. Never mind that your cross-hairs light up when you're aiming at an enemy on the other side of an obstacle - no no, you absolutely must be cheating. The Deep Impact, which boosts bullet penetration, should help you win this Achievement in no time.

3. Black Or White - Get a three kill streak while standing on top of a car. Make like Michael Jackson and hop around on top of a car. It's hard not only because of how exposed you'll be and how little space you'll have to manuever, but because, oh yeah, cars explode if they're take too much damage.

4. Hollywood Ending - Defuse a bomb in a Search and Destroy mode game with one second remaining. If you don't like being cursed out by your teammates, you might not like this Achievement. It will require you to hover over the enemy bomb until only a few seconds remain before finally trying to defuse it. If your sense of timing sucks, be prepared for some humiliation.

5. Only For You - Get killed five times in a row by the same enemy (ten-player minimum match). Might have to tune the numbers on this one a bit but the general idea is that you'll have to evade/kill other players in a frantic attempt to die repeatedly to the same player over and over. As with the other Achievements outlined here, you'll look fairly stupid attempting this but your embarrassment amuses us.

Obviously, you'll need a pen and paper to keep track of these. Yes, it's a real hardship but it's the burden you have to bear in order to escape the horrid fate of buying a new game.