If nothing else, Marine Sharpshooter 3 lives up to its billing. You play a marine. You do a lot of sharpshooting. And that's about it. The box-cover blurb claims that this franchise has sold over a million copies, but it's hard to see how a game this dumb and derivative could ever develop a fan base. While the game isn't horrific looking, and there is a lot of shooting going on, all you do is stalk through linear levels sniping everything that moves. Retro shooter fans might enjoy this monotonous killing for an hour or so, then look for the uninstall icon.