It's got 20 levels, a gradius like powerup system, 7 ships each with unique special abilities (nuke, plasma wave, fighter squadron, etc), 2 player local coop, 4 player online coop, 40 unlockable attachments (permanent ship upgrades), and an endless survival mode. It runs on Windows, Linux, and Mac.
Here's a trailer: https://youtu.be/dFlXHuFc_U4
There's a demo here: http://www.indiedb.com/games/counterattack/downloads
Here's the steam page: http://store.steampowered.com/app/451600/
Here's a few steam keys for you guys

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I did the var thing so bots don't get them.
Let me know what you guys think
