This game is the first compilation to be released as part of the Sega Ages 2500 series.
It contains both an upgrade of the original 1990 arcade release of Bonanza Bros. and an updated version of Puzzle & Action: Tant-R, first seen in 1992.
Bonanza Bros. is almost identical to the original, bar a few small cosmetic changes, whereas Tant-R has received higher definition graphics and several minigames from its sequel, Puzzle & Action: Ichidant-R.