The game is a 2-4 person multiplayer shooter, where the main hook is that all characters are invisible until they shoot, or use their respective special ability. It is planned to feature seven different playable characters, and 50 different maps to play on spanning five distinct planets. All of this backed up a single player with AI opponents, local multiplayer, and online cross-platform multiplayer.
The alpha allows for players to play a perfectly functional but unpolished version of the game, and contribute towards the last bits of input and bug testing, for the price of what the game plans to sell for, which is $15. Purchasing access to the alpha will also grant you with a free Steam code for the full Invisigun Heroes, usable upon it’s release.
You can watch the original Kickstarter video for Invisigun Heroes below in case you want a better understanding of how it plays in action: