Bonanza Bros.
Bonanza Bros. — frequently asked questions
- What platforms is Bonanza Bros. on?
- Bonanza Bros. was released on Arcade, Sharp X68000, Commodore C64/128/MAX, ZX Spectrum, Linux, Wii, Sega Mega Drive/Genesis, Atari ST/STE, PC (Microsoft Windows), Mac, Amiga, Turbografx-16/PC Engine CD, Amstrad CPC, Sega Master System/Mark III, PC Engine/TurboGrafx-CD.
- When did Bonanza Bros. release?
- Bonanza Bros. was first released on June 18, 1990.
About Bonanza Bros.
Just who are these guys? Mobo and Robo are the coolest villains you'll ever meet- they rob banks, museums (and innocent computer gamers of their sanity). One evening whilst watching TV a mysterious stranger appeared on screen. "Good Evening Boys I've got a job for you... My businesses are being robbed and I need you to test my security systems... Deliver the goods and I'll reward you." Take control of Mobo and Robo and guide them around the various establishments, collecting evidence on the way.
Summary via IGDB.
Game details
- Platforms
- Arcade, Sharp X68000, Commodore C64/128/MAX, ZX Spectrum, Linux, Wii, Sega Mega Drive/Genesis, Atari ST/STE, PC (Microsoft Windows), Mac, Amiga, Turbografx-16/PC Engine CD, Amstrad CPC, Sega Master System/Mark III, PC Engine/TurboGrafx-CD
- Developer
- Synergy
- Publisher
- Sharp
- Game modes
- Single player, Multiplayer, Co-operative, Split screen
- Themes
- Action
Details via IGDB.
Reception
Every version compared
Prices, contemporary reception and the studio credited for each release
| Platform | Year | Loose | Complete | Sealed | Period reviews | Fake risk |
|---|---|---|---|---|---|---|
| Sega Master SystemDetails ↓ | 1991 | $8 | $19 | — | 7 reviews | Low (look-alike) |
| Sega GenesisDetails ↓ | 1991 | $20 | $43 | $75 | 5 reviews | Low |
The cheapest way to own it loose is the Sega Master System version ($8).
Also released on: Arcade · Sharp X68000 · Commodore C64/128/MAX · ZX Spectrum · Linux · Wii · Sega Mega Drive/Genesis · Atari ST/STE · PC (Microsoft Windows) · Mac · Amiga · Turbografx-16/PC Engine CD · Amstrad CPC · Sega Master System/Mark III · PC Engine/TurboGrafx-CD. We haven’t priced or authenticated those versions yet.
Prices are per version and are not interchangeable, and neither are the reviews: conversions in this era were often built by a different studio than the original, so a score earned on one machine says nothing about how another plays.
Collector value & authenticity
Sega Master System · PriceCharting sold data · Verified 2026-10-28
Release record
| Territory | Date | Product number |
|---|---|---|
| Europe / PAL | December 1991 | 7073 |
- Region
- EU
- Released
- 1991
- Authenticity
- Low
The Sega Master System version
A competent Master System take on Sega's arcade stealth-and-shooting game, and a cheap one.
Bonanza Bros. came out in Europe in December 1991, published by Sega with Sanritsu as the developer of the Master System version. It is a conversion of Sega's arcade game, which was also ported to the Mega Drive and several computers. Console XS rated the Master System version highly.
What the press said at the time
| Mean Machines Sega Issue 3 | December 1992 | OVERALL 57% |
| Sega Master Force Issue 2 | September 1993 | 76% |
| Sega Pro Issue 23 | September 1993 | 90% |
| Sega Pro Issue 24 | October 1993 | 90% |
| Sega Master Force Issue 3 | October 1993 | 76% |
| Sega Pro Issue 25 | November 1993 | 90% |
| Sega Pro Issue 26 | December 1993 | 90% |
“A conversion of the so-so coin-op, Bonanza Bros plays much the same as the original, but is far too easy to complete and only has a one-player option. Doh! Not the greatest cartridge money can buy...”
“As Robo (his bro’s gone missing in this version), break into buildings, collect swag and shoot or stun guards. A cash-grab¬ bing sub-level adds depth to this wacky coin-op conversion, which features unusual Lego People graphics.”
“Great graphics and some extra bonus stages. Primarily a two-player game. but iťs aiso brilliant in one player as you try to find the loot on ten frantic stages.”
“Great graphics and some extra bonus stages. Primarily a two-player game, but iťs aiso brilliant in one player as you try to find the loot on ten frantic stages.”
How the Sega Master System version differs
Ports of the arcade game, the Master System one included, show minor graphics differences depending on the system, and some gameplay changes, mainly in the bonus stages.
Also on other platforms
Arcade · Amstrad CPC · Atari ST · Commodore 64 · Amiga · PC Engine/TurboGrafx-CD · Genesis · X68000 · ZX Spectrum
| Arcade | Sega |
- Arcade. Game Machine ranked the arcade game the third most popular in Japan in its July 15, 1990 issue.
Before you buy
The European cart is the one to look for, and loose it costs less than the typical European-only game. A complete copy costs more than a loose one, though both are cheap.
Collector value & authenticity
Sega Genesis · PriceCharting sold data · Verified 2026-10-29
Other releases and variants
| Release | Loose | Complete | Sealed |
|---|---|---|---|
| European (PAL) release | $14 | $38 | — |
| Japanese release (Bonanza Bros.) | $13 | $36 | — |
How often it sells
- Loose: about 2 times a month
- Complete: about once a week
- Sealed: about once a year
Prices marked “few sales” rest on about one recorded sale a year, so treat them as a rough guide: the next copy could sell well above or below. Expect to wait for one to come up.
Sales frequency from PriceCharting's completed-sale records, as of 2026-10-29.
Price over time
- Loose
- Complete
A loose copy sold for about $3.09 in Oct 2007, $14.02 five years ago, and $19.97 as of Oct 2026.
Show as table
| Month | Loose | Complete |
|---|---|---|
| Jan 2008 | $3.45 | — |
| Jan 2009 | $2.30 | — |
| Jan 2010 | $2.00 | — |
| Jan 2011 | $3.95 | — |
| Jan 2012 | $2.73 | — |
| Jan 2013 | $3.99 | — |
| Jan 2014 | $6.97 | $10.47 |
| Jan 2015 | $8.00 | $9.99 |
| Jan 2016 | $8.00 | $16.99 |
| Jan 2017 | $8.99 | $19.95 |
| Jan 2018 | $9.27 | $23 |
| Jan 2019 | $9.73 | $18.62 |
| Jan 2020 | $11.63 | $29 |
| Jan 2021 | $12.22 | $29 |
| Jan 2022 | $17.35 | $35 |
| Jan 2023 | $17.47 | $43 |
| Jan 2024 | $16.46 | $35 |
| Jan 2025 | $16.80 | $35 |
| Jan 2026 | $19.56 | $40 |
| Oct 2026 | $19.97 | $43 |
Monthly price estimates from PriceCharting's completed-sale records, sampled quarterly, through Oct 2026.
Release record
| Territory | Date | Product number | Barcode |
|---|---|---|---|
| North America | November 1991 | 1124 | 010086011241 |
| Europe / PAL | 14 November 1991 | 1124 | 4974365611248 |
| Japan | 17 May 1991 | — | — |
- Region
- NA+EU+JP
- Released
- 1991
- Authenticity
- Low
The Sega Genesis version
A Genesis take on Sega's stealth action arcade game that Console XS found very easy.
This is the Genesis / Mega Drive version of Sega's Bonanza Bros., a side-scrolling stealth action game that began in the arcade on Sega's System 24 board. Sega made the home cartridge itself. It came out in Japan on 17 May 1991, and in North America and Europe in November 1991.
Mega Zone magazine enjoyed the Mega Drive version for its digitized speech and wit. Console XS praised its presentation and neat graphics but found it very easy.
What the press said at the time
| Mean Machines Games Guide | May 1992 | OVERAa 73% |
| MegaTech Issue 17 | May 1993 | 69% |
| Mega Summer Special 1993 | July 1993 | 60% |
| Sega Pro Issue 25 | November 1993 | 58% |
| Sega Pro Issue 36 | September 1994 | 58% |
“Even on the harder setting. Bonanza Bros doesn't represent a serious challenge !o a hardened games player due to the wealth of credits.”
“The two-player action is fun, but at the end of the day what you need is a challenge, and unless you're a games novice, this simply fails to deliver.”
“Dodge guards and guard dogs and subject your characters to all sorts of jolly sight gags (standing on rakes, crashing through walls). Stylised bubbly graphics look great. Is INCREDIBLY easy to complete.”
“Puts the fun back into two-player fun, but don’t attempt a one player game.At £19.99 this is worth”
Also on other platforms
Master System · Arcade · Amstrad CPC · Atari ST · Commodore 64 · Amiga · PC Engine/TurboGrafx-CD · X68000 · ZX Spectrum
- PC Engine/TurboGrafx-CD. The TurboGrafx-CD and X68000 ports were Japan only, while the ZX Spectrum and Amstrad CPC ports were Europe only.
Before you buy
Among US carts it sits above the middle. The European cart usually costs less than the US one, and the Japanese Mega Drive cart usually costs less still. Japanese carts are a different shape from Western ones and do not fit a Western console without an adapter or removing two plastic tabs in its slot. A complete US copy means the case, cartridge and manual.
Bonanza Bros. screenshots
Watch on YouTube
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