"Teewars is a multiplayer 2D shooter, drawing its inspiration not only from the old classics, but also incorporating the advancements that FPS games brought in when the torch was handed over."

The game features 3D-accelerated sprite graphics, mouse-aiming, a grappling hook, some rather weird weaponry and a built-in multiplayer server. You can play it on Windows, MacOS X and any Linux flavor that can draw stuff on a screen."

The game can be found at teewars.com