The versus shmup genre is a seldom-explored niche within a niche, but Rival Megagun looks like it might be one of the best takes yet. Released today and developed by Spacewave Software, it’s a twin vertical shmup for one or two players, local or online. For those who’ve never played one before, the genre works a bit like a versus puzzle game blended with a vertical shooter – take out enemies in rapid succession on your side of the screen to attack the other guy. Or you can just transform into a screen-hogging boss, hop on over and attack directly. Check out the trailer below.