Puzzle & Action: Tant-R (also known as just Tant-R (タントアール, Tanto Āru)), is a puzzle video game developed and published by Sega in 1993 for the Sega System C in Japan. The first instalment in the Puzzle & Action trilogy, it is a spin-off of Bonanza Bros. The characters from Bonanza Bros are featured as protagonists, functioning as detectives. A prison escapee is chased, and his henchmen interfere. A series of timed mini games must be completed to defeat the henchmen. The game features references to western culture.

The game was ported the Sega Mega Drive and Game Gear in 1994, to the Saturn as part of the Sega Ages Shukudai ga Tant R compilation in 1996, and released on the Wii Virtual Console in 2007. An updated version was released for the PlayStation 2 as part of the Sega Ages 2500 Vol. 6 compilation in Japan in 2004 (re-released on the PlayStation Store in 2013), and the Sega Classics Collection, the only English localisation, in 2005. In 2002, a service allowing games to be downloaded to a mobile phone was launched. Reception was mixed: although the graphics and gameplay were praised, some reviewers criticised the mini-games themselves. Puzzle & Action: Tant-R was followed by two sequels: Puzzle & Action: Ichidant-R, featuring a mediaeval theme, in 1994, and Puzzle & Action: Treasure Hunt, featuring a treasure-hunting theme, in 1995.