If you are looking for a great shoot em’ up io game, you can try Gunwars io. It is very popular game that is played by thousands of players. The game is in 2D graphics and performance is very good. Like in other shoot em’ up games, you try to shoot your enemies in this game. You will have different guns to choose. While you play and get points you can upgrade your abilities and also items. Controls are simple. Use arrow keys to move, left click to shoot and right click to dash. Enjoy playing this adventurous game!