Castle Quest Reaches the Commodore Plus/4 With a New 2026 Conversion

Ricky Derocher's Castle Quest arrives on Commodore Plus/4, expanding the TED chip computer's growing 2026 software catalogue with 2D dungeon platforming.

Ricky Derocher's Castle Quest has arrived on Commodore's Plus/4, extending a game first released in 2024 onto one of the company's least commercially successful but increasingly active home computers. The premise is deliberately traditional: enter the castle and save the princess. PDRoms added the Plus/4 version to its homebrew coverage on 12 September, making it another example of developers revisiting machines that received far less software attention than the Commodore 64 during their original commercial lives. Commodore introduced the Plus/4 in 1984 as part of the 264 family alongside the Commodore 16 and 116. The machine included built-in productivity software and a redesigned TED graphics and sound chip but was not compatible with most C64 games or peripherals. That incompatibility proved devastating commercially. Consumers naturally compared it with the enormously successful C64, and publishers had little incentive to create separate versions for a smaller installed base. The result was a machine with an awkward reputation that has only become more interesting with historical distance. Modern homebrew developers are no longer constrained by 1980s market share. They can choose Plus/4 precisely because its differences create a challenge and because its owners are eager for new software. TED offers visual capabilities unlike VIC-II while providing weaker sound, encouraging developers to approach conversions differently rather than mechanically copying C64 code. Castle Quest's migration to the machine demonstrates this modern reversal: software can now move toward an obscure platform because the audience's enthusiasm matters more than commercial volume. Simple fantasy platform and adventure structures also suit the hardware well. A castle provides discrete rooms, recognisable enemies, keys, treasures and environmental hazards without requiring enormous scrolling worlds or advanced 3D calculations. The new release will not suddenly transform Plus/4 into a mainstream retro platform, but it contributes to a growing software catalogue that did not exist when Commodore was selling the machine. That catalogue gradually changes how collectors experience supposedly unsuccessful computers. Instead of owning a Plus/4 purely to study a historical mistake, users can load genuinely new games and participate in an active community. Forty-two years after Commodore struggled to explain why customers needed the Plus/4, homebrew developers are finally giving owners a simple answer: because people are still making games for it.