Outnumbered is a simple shooter game in which you are a strange flying insect who must destroy all other flying insects in order to get to the next level. To kill them you just need to fire at them, but you also must avoid the shots of other insects which will try to kill you too. There are lots of insects per level, so you will need to work hard to kill them all before they kill you.
Every level is a different swamp with a different scenario. The game features 3D graphics, although their quality is not very good. The controls are really simple since you move your insect with the arrow keys and you use the spacebar to shoot. The insect will keep on flying, so you just need to worry about moving it in the right direction. Unfortunately, the game includes only one mode and one difficulty level. The game has simple sounds and suitable, but very repetitive music, which, fortunately, you can mute from the "Options" menu.
In short, I really wouldn't recommend Outnumbered because there are much better shooter games out there.