Join our Discord to chat with fellow friendly gamers and our knowledgeable contributors!

Not an American user?


Mobo and Robo Bonanza are enjoying their favorite television show when the picture crackles and a shadowy figure of a mysterious stranger appears on screen. This figure asks them to collect certain items that he has placed inside various buildings to test his security force. If they return the items successfully, Mobo and Robo will be rewarded. The two of them state that they will get the job done in just three minutes. However, little do they know that each building is packed with security guards who will raise the alarm if they are caught red-handed. Fortunately both Mobo and Robo are equipped with bullets that can knock the guards unconscious for a few seconds. An $100 reward will be given out if Mobo and Robo are apprehended.

As either Mobo or Robo, you must collect all the treasures before leaving the ten buildings and shoot any security guards that get in your way. Remember that you are under a time limit. An in-game map will help you locate the treasures. There is a bonus stage after three buildings, where the object is to collect the gold bars in a limited amount of time without one of the three spotlights shining on you. If it is possible, hide behind open doors. If you manage to get all the gold bars, 10,000 points is added to your score. There are three of these bonus stages, but each of them varies.


Bonanza Bros. Amstrad CPC Knocked down
Bonanza Bros. Genesis Stage 2: Millionaire's Mansion
Bonanza Bros. Genesis It's hurts. One life less.
Bonanza Bros. Arcade Stage 1.

Promo Images

Bonanza Bros. Magazine Advertisement Page 138
Bonanza Bros. Screenshot
Bonanza Bros. Screenshot
Bonanza Bros. Screenshot

Alternate Titles

  • "Bonanza Brothers " -- US Genesis title
  • "ボナンザ ブラザーズ" -- Japanese spelling

Part of the Following Group

User Reviews

Average, "strategy optional" platformer Genesis Andrew Fisher (707)

Critic Reviews

Amiga Action Amiga Jan, 1992 90 out of 100 90
Zzap! Commodore 64 May, 1992 85 out of 100 85
Play Time SEGA Master System Jan, 1992 77 out of 100 77
ST Format Atari ST Jun, 1992 72 out of 100 72
All Game Guide Genesis 1999 3.5 Stars3.5 Stars3.5 Stars3.5 Stars3.5 Stars 70
Amiga Format Amiga Feb, 1992 70 out of 100 70
Video Games SEGA Master System Feb, 1992 62 out of 100 62
Mean Machines SEGA Master System Oct, 1992 57 out of 100 57 Genesis Feb 04, 2006 5.5 out of 10 55
Play Time Commodore 64 Sep, 1992 32 out of 100 32


There are currently no topics for this game.


There is no trivia on file for this game.

Contributed to by Corn Popper (69060), chirinea (46643), FatherJack (62732), Foxhack (30907), Kabushi (256460), Martin Smith (75041), Terok Nor (30532) and Katakis | カタキス (41999)