Five dollars isn't a lot of money by any stretch of the imagination, but Get Even's limited offerings will make you wonder why its content wasn't bundled together and offered as a single game. It's a huge bummer that the pay-to-play extra missions are a necessity if you're going to pick up this table-turning homage to the timeless shooter, because as a complete package, Space Invaders Get Even is an arcade delight.
Flying around as a UFO and wrecking everything in sight is absolutely awesome. If you spend the full $20, you get a mighty fine, if overpriced, single-player game. Since the majority of the gameplay is only available when you buy the downloadable content, Get Even feels like a demo with a price tag on it.