Caltron 6 in 1 is a multicart developed and published in 1992 for the NES in North America by Caltron Industries, Inc., a Taiwan-based video game company which was either closely related to, or simply a pseudonym for, NTDEC. In Australia, it was published under the title Real Player‘s Pak by HES. Dynacom released the cartridge as Multi Ação 6-in-1 for the Brazilian market. All the featured games, except Porter, were released as single game cartridges in Spain by Gluk Video.

In video game parlance, a multicart is a cartridge that contains more than one game. Typically, the separate games are available individually for purchase or were previously available individually. For this reason, collections, anthologies, and compilations are considered multicarts. The desirability of the multicart to consumers is that it provides better value, greater convenience, and more portability than the separate games would provide. The advantage to developers is that it allows two or more smaller games to be sold together for the price of one larger game, and provides an opportunity to repackage and sell older games one more time, often with little or no changes.