!!!DO NOT PAY!!!! You upgrade and then are only paired with bots or players of the same level.... So if you stay at a low level you die the same as if you had the highest level. Also it takes sooooo long to load your weapon, so long it makes the game boring. And the characters make no sense, a little girl can kill the biggest character with only two shots. Because every player is EQUAL. SO DON'T PAY OR BOTHER WITH UPGRADING