MK Defenders of the Earth v3.3 is a non-profit fan-game based on the classic games of the MK saga. Powered in Mugen, this game uses the season 2.9 by Borg117 as base and material of the MKP 4.1 by MKP Team. The characters were created by the mugen community of MK which received various alterations to be mounted in this game. Stages already created by the mugen community were altered to be mounted in the game, also original scenarios were created using fan-arts, free green screen animations and sprites from other scenarios. The soundtrack is a set of music free of copyright with their licenses respected or permits granted. Hitsounds was taken from MKX.