The default AI for the engine however, can walk around and jump, and rarely attacks or guards the player's attacks when the AI Level is set to Hard. At most, two players can control characters, with others being controlled by the engine's AI (including Watch Mode, a demo mode where the computer controls all characters). However, characters do not necessarily use all seven buttons, nor need to follow a traditional six or four-button format. The engine uses four directional keys along with seven buttons for gameplay (A, B, C, X, Y, Z and Start), in order to accommodate six-button fighters which use three punches, three kicks and a start button which is often a taunt. The lifebar used originates from Capcom vs. Gameplay Original character Dragon Claw fighting Darkstalkers character Hsien-Ko in the RAW is WAR ring. The latest versions of the engine use the SDL library. It is written in C and originally used the Allegro library.
Content is created by the community, and thousands of fighters, both original and from popular fiction, have been created. Mugen (stylized as M.U.G.E.N) is a freeware 2D fighting game engine designed by Elecbyte.
