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Sonic 1 Delta

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Sonic 1 Delta - Platformer Classic

SEGA Genesis
Platformer
ROM Hack
5· 0 votes

Unofficial ROM hack. The notes below come from community sources and have not been verified against the patch itself, so levels, mechanics and features may differ from what is described.

Sonic 1 Delta is a fan-made ROM hack of the classic SEGA Genesis platformer Sonic the Hedgehog (1991). It was created for a community contest on the Sonic Hacking Contest (SHC) in 2020, and it modifies the original game's levels, layout, and some mechanics. Unlike an official release, this is a mod that reimagines the Green Hill Zone and beyond with new obstacles, altered enemy placements, and tweaks to the flow of each act. If you've played the original Sonic 1, this hack offers a fresh take on familiar stages, though it remains a Genesis-exclusive ROM file intended for emulators or flashcarts.

GAME INFO

Platform: SEGA Genesis
Genre: Platformer
Players: 1
Based on: Sonic the Hedgehog

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How to play Sonic 1 Delta online

Getting Started

Launching Sonic 1 Delta takes you straight to the title screen just like the original. Press Start to begin the game. You control Sonic as he runs from left to right through each act. The core loop is classic Sonic: collect rings to survive, avoid or spin‐dash into enemies, gather speed on slopes, and reach the goal post at the end of the act.

New players should know that rings are your only buffer against damage - getting hit without rings means losing a life. Checkpoints also reappear from the original game, so keep an eye out for the star posts. Because this is a hack, you might encounter unexpected enemy patterns, rearranged spikes, or altered level geometry. Take it slow at first to learn the new layouts.

CONTROLS

Controls

Arrow Keys: D-Pad / Movement
X: A button
S: B button
Z: C button
A: X button (6-button pad)
Q: Y button (6-button pad)
E: Z button (6-button pad)
Enter: Start / Mode

Sonic 1 Delta FAQ

Who developed Sonic 1 Delta?

The creator of Sonic 1 Delta is not widely documented; it was submitted to the Sonic Hacking Contest 2020 under the title "Sonic 1 Delta" but the specific author is not noted in the available source material. It is a fan project, not an official Sega product.

Is Sonic 1 Delta exclusive to SEGA Genesis or did it appear on other systems?

Sonic 1 Delta is a ROM hack of the original SEGA Genesis game Sonic the Hedgehog. It exists solely as a Genesis ROM image and was never officially released on any home console or handheld. It can only be played via emulation or on original hardware with a flash cartridge.

Can players save progress in Sonic 1 Delta?

The original Sonic the Hedgehog did not include a save feature, and this hack inherits that design - there is no save system. Players must complete the game in one sitting, though many emulators offer save state functionality as an alternative.