Teams is a game mode putting players into different teams, up to 7. The more players/bots, the more countries per one team, but the game still limits the number of bots in the world to 500 or so.
You get assigned a color, and play together with your color to beat the other teams.
Unlike Free for All you do not get to break your alliance or betray them. However, it is still possible to do team damage using missiles.
In the team game mode players often decide to pool resources, like sending troops to their allies on the front line or send gold to be able to afford defense posts and later on in the game MIRVs.
Winning
As of Update 34.0, team games use the same 80% land win threshold as Free for All (previously a team needed 95% of the map).
Team names
Since Update 34.0, clan tags can be used as team names: a team made up mostly of one clan takes that clan’s tag, a team split between two clans gets a hybrid two-clan name, and other teams keep their normal names.
Update 34.0 also fixed duo/trio/quad team forming so that human players are placed together instead of being scattered across bot teams, and fixed one-player teams on small public maps.