Worms Revolution

You should be able to get this after you are done with Campaign and Puzzle games, if not you can boost for it or get it eventually in online. Sentry guns have a few things you need to keep in mind. Scientist worms have the strongest Sentry in the game: they are weak towards fire, they don't move slower in water, they change direction it's facing very slowly but it stays fixed when it doesn't track a worm, you can repair them, they are bouncy and you can fly if you place them on a worms head correctly and magnets do not effect Sentry Guns. A great tactic for getting this online is to use Stick Up and steal the opponents Sentry Gun.