Append is a 2D top-down arena shooter with online multiplayer. Play as a futuristic hovering space train in a dilapidated space station, fighting other trains over who gets to scavenge the station or something, whatever. The reason is not important.
Your roof-mounted cannon can be upgraded by collecting power-ups, which are stored inside your train cars - watch out so the enemy trains don't destroy them!
Shoot the enemies to shrink them, and to snipe their abilities. Go super offensive and obliterate everything, or put everything on defense. Choose your own strategy!