Enter the Gungeon is a bullet hell dungeon crawler following a band of
  misfits seeking to shoot, loot, dodge roll and table-flip their way to
  personal absolution by reaching the legendary Gungeon's ultimate treasure:
  the gun that can kill the past. Select a hero [or team up in co-op] and
  battle your way to the bottom of the Gungeon by surviving a challenging and
  evolving series of floors filled with the dangerously adorable Gundead and
  fearsome Gungeon bosses armed to the teeth. Gather precious loot, discover
  hidden secrets, and chat with opportunistic merchants and shopkeepers to
  purchase powerful items to gain an edge.

  The Gungeon: Enter the Gungeon - a constantly evolving bullet hell fortress
  that elegantly blends meticulously hand-designed rooms within a
  procedurally-generated labyrinth bent on destroying all that enter its
  walls. But beware - the Gungeon responds to even the most modest victory
  against its sentries and traps by raising the stakes and the challenges
  found within!

  The Cult of the Gundead: The Gungeon isn't just traps and chasms - calm
  your nerves and steady your aim as you face down the gun-totting Cult of
  the Gundead. These disciples of the gun will stop at nothing to put down
  the heroes in their tracks and employ any tactics necessary to defend their
  temple.

  The Gungeoneers: Choose between one of several unlikely heroes, each
  burdened by a deep regret and in search of a way to change their past, no
  matter the cost. Filled with equal parts courage and desperation, these
  adventurers won't hesitate to dive across flaming walls, roll through a
  wall of bullets, or take cover behind whatever is around to make it to
  their goal alive!

  The Guns: Discover and unlock scores of uniquely fantastic guns to
  annihilate all that oppose you in the Gungeon - each carrying their own
  unique tactics and ammunition. Unleash everything from the tried and true
  medley of missiles, lasers, and cannonballs to the bizarrely effective
  volley of rainbows, fish, foam darts, and bees! Yep, bees.

  [b]Burn/mount, install, play![/b]