Derry Drain brings Pennywise to the Sega Master System

Independent developer cenobite83 has released Derry Drain-They All Float!, a new free action-platformer for the Sega Master System. The game is available to download on itch.io and runs on original hardware via flash cartridges or through modern emulators on PC.

The project is a homebrew release built around Stephen King's IT universe. The developer describes the game simply as "pennywise's platform panic." Players navigate 8-bit environments inspired by the town of Derry, dodging hazards and dealing with the clown.

8-bit horror

Translating modern horror into third-generation console limitations is a design challenge. The Sega Master System is powered by a Zilog Z80 processor running at 3.58 MHz, and it can display 32 simultaneous colors from a palette of 64. That hardware profile means developers have to rely on distinct sprite work and palette choices to convey atmosphere. You won't find detailed gore or lighting effects here. I want to see how the platforming mechanics hold up under these constraints, especially since the Master System is primarily known for bright, colorful platformers like Alex Kidd in Miracle World.

Platformers on the Master System often feature slightly floaty physics compared to their NES counterparts. Games like Sonic the Hedgehog and Phantasy Star pushed the hardware to its limits late in its lifespan, but early action titles relied heavily on precise jumps and memorization. Derry Drain leans into that classic arcade-style loop. You move right, you avoid the clown, and you try not to fall.

Horror properties are a popular subject for retro demakes and homebrew projects. Stripping away high-fidelity graphics forces a game to rely on tension and straightforward mechanics. A Pennywise game on an 8-bit console feels like a lost licensed title you might have rented from a video store in 1989, complete with the punishing difficulty typical of that era.

The Master System originally launched in Japan as the Sega Mark III in October 1985 before its international redesign. It struggled against the Nintendo Entertainment System in North America, but it found massive success in Europe and Brazil. Distributor Tectoy kept the console alive in South America for decades. That enduring international footprint is a major reason why the system still has an active homebrew community today.

The modern homebrew pipeline

Developers in 2026 don't have to write raw assembly code in the dark. Modern tools like devkitSMS allow creators to write in C and compile their work into ROM files that behave exactly like commercial releases from 1987. This pipeline has led to a steady stream of new software for Sega's 8-bit machine.

Releases like this usually come in the form of a digital ROM file. You can load it onto a device like an EverDrive to play on a real Master System, or run it through PC emulators like BlastEm or RetroArch. The digital download for Derry Drain includes the necessary files to get it running on your preferred setup.