This to this day is the ONLY vertical scrolling shooter I have ever finished. I have hated these type of games since I was a kid and for some strange reason, this game, with its silly wit, humor and very nice soundtrack kept me hooked till the very end. It has a pretty interesting path system wich allows for replayability as there are planets you can do while skipping others, each one having hidden levels and many other goodies. No seriously I hate these type of games, yet for some reason, I totally love this one. The story and not so cleverly disguised puns on big corporations enticed me. Check the soundtrack too!::D
