Caltron 6 in 1 is a multicart developed and published in 1992 for the NES in North America by Caltron Industries, Inc. (credited as Caltron Ind. 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.
As its title suggests, 6 in 1 consists of six different games in various genres, which mostly are popular clones of the era. It is composed of: Cosmos Cop, Adam & Eve, Magic Carpet 1001, Balloon Monster, Porter, and Bookyman.