This game is very short, and most of the "replay value" comes from playing different mission variations on the same map with roughly the same enemies, the same strategies, etc. It also doesn't do a very good job of teaching players the controls, and I found myself essentially forced to gradually learn them from loading screens. A 5 minute tutorial would have been very helpful, but it just wasn't present. Overall, I liked the content that it had, but I was done with it in about 2 hours. I'm glad I used Gamefly to play it instead of shelling out the $30 retail price for it!