Grand Theft Auto IV

You need to win at least one of each of the following:
Team Mafiya Work
Team Deathmatch
Team Car Jack City
Cops' N Crooks (each side)
Turf War

To get this achievement, you must be on the WINNING TEAM at least once in these online game modes:

-Cops N Crooks as cops and crooks
-Team Car Jack City
-Team Deathmatch
-Team Mafiya Work
-Turf War

Please note that being the "last player remaining" does not count as a win, so if that happens you'll have to replay that certain game mode.

i want add more tips for u!

1-if you wanna find each other in lobby easy; do this : when you load the game bring you're cellphone(d pad up)--go multiplayer--preferences--select all setting to "don't care"

**you need 2 players start these modes:

Deathmatch
Mafiya Work

**you need 4 players start these modes:
Car Jack City
Team Deathmatch
Team Mafiya Work
Team Car Jack City
Cops ‘n Crooks (both rounds)
Turf War

**you need 6 players for team player achievement(killing 5 opposing team members. )

As the achievement description says, you must be on the winning team of all multiplayer team modes.

You can easily boost this with friends: while playing in singleplayer, go to your phone > multiplayer > party mode.
Invite friends. They can unlock the achievement too if they join your team.
When everyone is at the abandoned casino of Alderney, the host (let's say that you're the host) press UP on dpad. The phone appears.
Select ranked game and choose a gamemode.
You will be warped to the choosed game mode with all the friends you invited. The people who don't need the achievement have to go in another team than yours.
Start the game. The team who is hunting the achievement do the objectives of the game mode while the other team does nothing.
Do this for all gamemodes and "Achievement Unlocked" :D

Note: for cops and crooks you have to win as the 2 teams, cops AND crooks.