Super Mario War

About

Super Mario War is an open-source, cross-platform, platform-adventure video game and level editor released on 16 December 2006. It is based upon gameplay elements and audiovisual media that are cloned from Nintendo's Super Mario series. The game centers on players fighting each other by one player jumping on the other player's head, or by making use of items, which can be picked up during gameplay.

Source: IGDB