Invisigun Heroes is a multiplayer focused 2D arena shooter built around a unique hook -- your character is completely invisible until you shoot or use your special ability. This requires all players to remember where other players are when they briefly appear, and then watch how the environment reacts and listen for their footsteps whenever they aren't attacking and visible. There are also power-ups a handful of different game modes in order to add some spice to the gameplay, which will span 50 arenas on 5 different planets, all with different hazards.
This game has a STRONG focus on multiplayer. There is a single player mode with AI opponents, but the game also features 2-4 player local multiplayer, as well as online play, AND cross-platform play. With all this multiplayer content and the mind games involved in every single match; Invisigun Heroes should be a great game to break out at parties.