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Sonic 1 KAwarino REV01

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SEGA Genesis Platformer ROM Hack Base Sonic the Hedgehog Ver REV01 5 (0) 10

Sonic 1 KAwarino REV01

Sonic 1 KAwarino REV01 on Genesis

Compiled by the Retro Games Online Editorial Team · Updated June 26, 2026

Sonic 1 KAwarino REV01 is a fan-made ROM hack of the original Sonic the Hedgehog for the Sega Genesis. It was likely created by an individual or small group in the modding community, but the specific author and release date are not widely documented. This is a modified version of the classic 1991 platformer, not an official Sega release.

At its core, the gameplay remains the same as the original Sonic 1: you control Sonic through a series of zones, collecting rings, defeating enemies by spinning into them, and reaching the goal ring at the end of each act. The hack appears to alter level layouts, graphics, or other mechanics based on the "KAwarino" and "REV01" labels, though specific changes are not confirmed. Expect the same fast-paced platforming with potential new challenges or twists.

If you have played every official Sonic game and want something different, this hack offers a fresh take on familiar levels. It is a niche modification best suited for retro enthusiasts who enjoy exploring unofficial versions of classic titles. While it may not be polished like an official release, it represents the creativity of the Sonic modding scene.

How to Play Sonic 1 KAwarino REV01 Online

Section 2 - Getting Started

When you start the game, press Start (Enter) on the title screen to begin. You control Sonic, a blue hedgehog who runs at high speed through each level. Your goal is to reach the end of the act while collecting rings and defeating enemies like Buzz Bombers and Motobugs. Rings protect you from damage as long as you have at least one, but if you get hit while ringless, you lose a life.

Each zone consists of two acts and a boss fight. The core loop is simple: run, jump, and spin attack. Use the D-Pad to move, X to jump, and S to perform a spin dash by holding down and pressing S. Since this is a hack, level layouts may be different from the original, so proceed with caution. There is no difficulty selection or complex menu to navigate.

Sonic 1 KAwarino REV01 Keyboard 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

Frequently Asked Questions

Who developed Sonic 1 KAwarino REV01?

The specific creator or team behind this ROM hack is not widely documented. It appears to be an unofficial modification of the original Sonic the Hedgehog game.

Is Sonic 1 KAwarino REV01 exclusive to SEGA Genesis or did it appear on other systems?

As a ROM hack of the Genesis original, it only exists for the Sega Genesis and Mega Drive platforms, playable through emulation. It was not released on any other consoles.

Does Sonic 1 KAwarino REV01 have a multiplayer or co-op mode?

No, like the original Sonic the Hedgehog, this hack is a single-player experience. There is no cooperative or versus mode included.