Mario's Time Machine is an educational video game originally released for MS-DOS and then for the Nintendo Entertainment System and Super Nintendo Entertainment System consoles. The Software Toolworks both developed and published the MS-DOS and Super NES versions in 1993, while the NES version was developed by Radical Entertainment and published by Nintendo in 1994. The MS-DOS version was re-released as Mario's Time Machine Deluxe in 1996. Mario's Time Machine is one of several educational Mario video games that were released during the early 1990s; the game focuses on teaching human history. While the gameplay and engine varies between the three different versions, the story is roughly the same: the player assumes the role of Mario, who uses a time machine to return various artifacts, which had been stolen by Bowser, to their correct points in time. Mario's Time Machine received generally negative reception since its release, holding an aggregate score of 60.25% on GameRankings based on two reviews. Its use as an educational title has been mixed, and the game has been compared to another educational history game, Where in Time is Carmen Sandiego?