Gestural controls, multi-touch surfaces, musical instruments, voice recognition—even brain control. Games are moving beyond the iconic hand-held controller, and into the future. But is the secret to good games found in high-tech interfaces? Kokoromi proposes that game developers can still find beauty in absolute simplicity. On March 10th, Gamma 4 will unveil brand-new games that use JUST ONE BUTTON.

Gamma 4 invites software developers to push the limits of gameplay with a single input. Game developers, media, and industry luminaries from around the world, will join the general public to view and play the Gamma 4 games at at a party that bridges the end of the Independent Games Summit and the start of the main GDC. Following the event, all the games will be playable in a dedicated booth on the GDC Expo floor. Game creators whose games are selected for presentation at Gamma 4 will also be awarded free GDC All-Access passes.


  • Use a single button as your player input, in a unique or experimental way. Be creative.
  • The game must be “pick up and play.”
  • The official controller is the Xbox360 controller. Player input must be
    assigned to the A button, which can be PRESSED or RELEASED. The Xbox360 controller is the only one used for judging, and the only one provided at Gamma.
  • Your game can support any number of players up to 4. Each player may have their own controller.

  • The game may run under Windows or OSX, and you must provide an installer or ZIP archive containing all files required to play.
  • The game cannot rely on an internet or LAN connection (there will not be connectivity provided during the event).
  • The gameplay cannot rely on audio information, since there will not be
    audio output provided during the event. Non-essential audio is permitted.
  • The total gameplay session must be no longer than 5 minutes, including any intros, instructions, or credits. At the end of each session, the game must return to a “start” state for the next player(s).
  • The maximum game resolution is 1024Ă—768.
  • Pre-existing games will not be accepted.
  • The submission deadline is Jan 31, 11:59pm Pacific time.
  • To submit a Gamma4 game, visit the submission page and follow the instructions.


  • Are there any team size restrictions?
    • No, but a maximum of 2 (TWO) GDC passes per team will be awarded.

  • Are gamemakers required to travel to Gamma/GDC if their game is accepted?
    • No, but the GDC passes are for creators only, and are non-transferable.
  • Are there any restrictions on (development tools, who can submit, file size, gameplay)?
    • If it’s not specifically restricted in the Rules, it’s permitted.
  • Can an individual or team submit more than one game?
    • We strongly recommend one submission per team.
  • How many games will be selected for Gamma?
    • We typically select only 5-7 games to showcase.

Special thanks to our premiere sponsors and co-organizers, Think Services and Flashbang Studios, for helping bring Gamma 4 to the Game Developers Conference!