Montezuma's Revenge gets a 16-bit Apple IIgs remaster

Homebrew developer Riad Megueddem has released MontezumaGS, a free Apple IIgs remaster of the 1983 platformer Montezuma's Revenge. The game is available to download today on itch.io and runs on both original hardware and emulators like KEGS.

According to the announcement on Call-A.P.P.L.E., the project preserves the original Apple II game logic. Movement, physics, collisions, and enemy behavior remain untouched. The presentation is entirely new.

Robert Jaeger programmed the original Montezuma's Revenge when he was 16 years old. Parker Brothers published it in 1984 across platforms like the Commodore 64, ColecoVision, and the standard 8-bit Apple II. Players control an adventurer named Panama Joe as he navigates a 99-room subterranean labyrinth. You collect keys, dodge bouncing skulls, and map out a non-linear tomb. It is widely considered an early precursor to the Metroidvania genre, demanding careful routing and inventory management long before those mechanics became standard.

The Apple IIgs launched in September 1986. It featured a 16-bit WDC 65C816 processor and advanced multimedia capabilities, bridging the gap between the classic Apple II line and the Macintosh GUI. Despite its power, the IIgs never received an official port of Jaeger's game. This homebrew release finally brings Panama Joe to the 16-bit machine.

Super Hi-Res and Ensoniq audio

Megueddem rebuilt the visuals using the system's 320x200 Super Hi-Res graphics mode. The sprites are redesigned and fully animated, replacing the blocky 8-bit graphics with detailed pixel art that fits the 16-bit era.

The audio overhaul is just as thorough. The IIgs is famous for its Ensoniq DOC sound synthesizer, a 32-oscillator chip that was incredibly advanced for 1986. Megueddem utilized this hardware for new title music, in-game tracks, and sound effects. Hearing the Ensoniq chip put to work on a classic platformer is a treat.

The project relies heavily on modern community-developed tools. Megueddem credited Antoine Vignau of Brutal Deluxe Software for technical advice and real-hardware testing. The game supports standard keyboards and joysticks, along with the Apple IIgs 4Play multi-controller adapter.

A thriving 16-bit scene

The Apple IIgs homebrew community has been busy lately. Just as Sinistar is now playable on the Apple IIgs, classic 8-bit titles keep finding new life on Apple's flagship computer. Developers are still finding ways to squeeze performance out of the 65C816 processor.