One Must Fall: 2097 is a fighting video game for all IBM-compatible computers on DOS, programmed by Diversions Entertainment, published by Epic MegaGames and released in October 1994.

The game has two main play modes: One-Player Mode, in which the company that markets the robots, World Aeronautics and Robotics (WAR), is holding a competition among its employees to decide who will be selected to oversee the establishment of the first Earth base on Jupiter's moon, Ganymede.

Each HAR has three special attacks that can be discovered (except for Shadow and Nova, who both have four), along with a "scrap" and "destruction" move (similar to fatalities in Mortal Kombat) that can earn bonus points and, in some cases, unlock secrets.

Using destruction moves in the tournament mode in the higher difficulty levels sometimes results in the player being challenged by an unranked opponent.

The game began development under the title of simply One Must Fall and the beta demo was released as freeware in May 1993.