This game is a LOT of fun! Just hope it doesnt get flamed because of the technical flaws that has in it!
Talking about the gameplay is probably talking about the best part of Destroy all Humans! The control scheme is very intuitive and easy to get used to, the weapons you can use have fun effects and at all times you really feel that you are an alien with super advanced weaponry that can easily take out a city on your own. Cruisin' the city in your flyin' saucer feeling omnipotent its a blast and the fact that you can upgrade your weaponry, saucer, etc. gives the game a depth that ensures hours of good ol' fashion human-torturin' fun!!