Your goal as a team is to have at least one member alive/unfrozen at the end of the round.
Freezing: Kill an enemy player to freeze them in place! They will be stuck and unable to move or attack for the rest of the round unless unfrozen.
Unfreezing: To unfreeze a teammate, stand next to their frozen bodies until the white ring around their feet reaches maximum size. They'll unfreeze and be ready to play again!