Invaders: Corruption is a fully procedurally generated arena shooter. That means, after entering a seed-key, every enemy, the appearance of your ship, the arena itself, the gameplay and so forth - will be based on whatever key you entered. Different key, different looking and behaving game. Of course, you can share cool keys with your friends online. Design: The game mixes retro stylings and sounds with todays technology & understanding of arcade action. Glowing pixelated sprites meet today's graphics capabilities. Online HI-Scores and leader-board are available. Compare against your friends and the world's top invader hunters.
For something this cheap (free), it's a great deal. The graphics are good, the music is great, and even the simplistic style of the game suits it perfectly. Add the competitiveness of the game and it becomes more awesome!
Kudos to the developers who did such great work to this masterpiece!