Basement Kombat

Isaac, Magdalene and Cain as playable fighters — a local two-player versus that plays from your own copies of Mortal Kombat X and The Binding of Isaac: Rebirth.

Press Play and you land straight on a character select screen with the three Isaac fighters already on the roster. Pick two, press Start, fight. First to win two rounds takes the match.

The fighters

Each fighter keeps Mortal Kombat X style normals — jab, straight punch, high kick, low kick, uppercut and sweep — and carries two special moves built from their signature Isaac items:

| Fighter | Special 1 | Special 2 | |---|---|---| | Isaac | Brimstone — a full-screen laser beam | Bombs — lobbed, then explode | | Magdalene | Mom's Knife — a piercing throw that crosses the screen | Yum Heart — heals once a round | | Cain | Lucky Foot — a dashing trip that knocks down | The Poop — a lobbed stun |

How you play

Local versus only, two people on one keyboard.

• Player 1: A/D move, W jump, S crouch/block, J light, K heavy, L special 1, U special 2, Enter confirm.
• Player 2: ←/→ move, ↑ jump, ↓ crouch/block, Numpad 1 light, Numpad 2 heavy, Numpad 3 special 1, Numpad 5 special 2, Right Shift confirm.

There is no online play and no tutorial.

Where the art and sound come from

This download ships none of Isaac's or Mortal Kombat X's content. At run time the program reads what it needs from the games you already own:

• Isaac sprites, sounds and music come from your Rebirth install — read straight out of the packed .a archives, or from loose files under resources/, whichever your install has. Anything it cannot find falls back to built-in procedural art and synthesised sound, so it always runs.
• Mortal Kombat X is verified by finding its executable and checking its content folder. Melty passes that folder to the program when it starts, so it never asks you for a path.

Honest limits

• The normals are Mortal Kombat X style, not MKX's exact frame data. Mortal Kombat X is a closed Unreal Engine 3 game with no mod loader, so an outside program cannot reuse its real move data.
• Local two-player only. No online play.
• The built-in fallbacks are deliberately generic and are not Isaac look-alikes.

Credits

Built on public, permissively licensed code: stb_image / stb_image_write / stb_vorbis (public domain / MIT), miniz (MIT), and the Gibbed.Rebirth project (zlib) as the reference for the Isaac archive format. The modding route follows universal-modder's "engine recreation" approach. Full notices ship in the release.