I think that more games should follow the example "Call of Duty" is setting, it is one of the , if not the most successful game franchise of all time. I think that sales would go up if we added killsteaks to it seeing it's one of the many elements that made CoD great! Who else agrees?
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I'm thinking there should be killstreak skills (upgradeable) so you could get an airstrike at 2 or 3 kills. Maybe even at 1 kill when you're level 100.