Instructions
Join a Demolition or Search & Destroy game. These objective-based game modes will earn you more credits than the rapid free-for-all gameplay of Deathmatch. Get into a game with as many other players as possible. Your credits will increase with the number of people in the game.
Do your best to stay alive. Though keeping yourself from getting killed is a matter of skill and luck, you'll be awarded more credits for lengthy kill streaks and a low death count. The only way to do this is to keep practicing.
Rack up as many subsequent kills as possible. Kill streaks can be hard to get in a fast-paced game like "Project Blackout," so if your goal is a large amount of credits, you'll want to opt for less risky forms of combat, such as sniping. Being a good sniper is difficult, but head shot streaks will earn you many credits.