Master System

Sonic Chaos

The inhabitants of South Island are in danger! Dr. Robotnik has stolen all the Chaos Emeralds which kept the power balance. Robotnik has thrown the Emeralds in a parallel universe and is keeping the red one. Sonic and Tail must retreive all the Chaos Emeralds before the destruction of South Island. This is the first Game Gear game where you can play either Sonic or Tail.

Genre: Platform
Year: 1993
Developer: Aspect Co. Ltd.
Publisher: Tec Toy Indústria de Brinquedos S.A.
Players: 1

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P2P Netplay available on compatible cores

Achievements

81 achievements · 568 total points

Blue Skies and Green Meadows Clear Turquoise Hill Zone.
3 pts
City of the Future Clear Gigalopolis Zone.
5 pts
Robotnik's Fantasy Island Clear Sleeping Egg Zone.
5 pts
Ecological Disaster Clear Mecha Green Hill Zone.
5 pts
Interdimensional Travel Clear Aqua Planet Zone.
5 pts
Technological Terror Clear Electric Egg Zone and Defeat Dr Eggman!
10 pts
Blue Blur Hero Beat the game as Sonic.
10 pts
Two-Tailed Hero Beat the game as Tails.
10 pts
Immortal Hero Complete the game without dying.
50 pts
Gem of Miracles Collect a Chaos Emerald.
5 pts
Ready to Face Robotnik Collect five Chaos Emeralds.
10 pts
Speedy Emerald Collector Collect five Chaos Emeralds before Sleeping Egg Zone Act 2.
10 pts
Savior of South Island Beat the game as Sonic with all Chaos Emeralds.
25 pts
Where's my Special Stage? Collect 100 Rings as Tails.
2 pts
Like Diamonds in the Sky Earn 7 lives and collect the Chaos Emerald on Special Stage 1.
10 pts
Chaos Tower Climb Collect all 106 rings and the Chaos Emerald on Special Stage 2.
5 pts
Wrong Turn at Albuquerque Take the wrong path on Special Stage 3.
1 pts
Rocket Enthusiast Collect all 5 Rocket Boots and the Chaos Emerald on Special Stage 4.
10 pts
Time Freeze Expert Collect all 15 rings and the Chaos Emerald with 50 seconds remaining on Special Stage 5.
10 pts
Turquoise Hill Explorer - Act 1 Earn an extra life in Turquoise Hill Zone Act 1 by collecting 100 rings.
3 pts
Turquoise Hill Explorer - Act 2 Earn an extra life in Turquoise Hill Zone Act 2 by collecting 100 rings.
3 pts
Fully Prepared - Turquoise Hill Find all 19 rings in Turquoise Hill Zone Act 3.
3 pts
Gigalopolis Explorer - Act 1 Earn an extra life in Gigalopolis Zone Act 1 by collecting 100 rings.
4 pts
Gigalopolis Explorer - Act 2 Earn an extra life in Gigalopolis Zone Act 2 by collecting 100 rings.
4 pts
Fully Prepared - Gigalopolis Find all 19 rings and the invincibility box in Gigalopolis Zone Act 3.
3 pts
Sleeping Egg Explorer - Act 1 Earn an extra life in Sleeping Egg Zone Act 1 by collecting 100 rings.
5 pts
Sleeping Egg Explorer - Act 2 Earn an extra life in Sleeping Egg Zone Act 2 by collecting 100 rings.
5 pts
Fully Prepared - Sleeping Egg Find all 82 rings, the invincibility box, and the 1-up box in Sleeping Egg Zone Act 3.
5 pts
Mecha Green Hill Explorer - Act 1 Earn an extra life in Mecha Green Hill Zone Act 1 by collecting 100 rings.
5 pts
Mecha Green Hill Explorer - Act 2 Earn an extra life in Mecha Green Hill Zone Act 2 by collecting 100 rings.
5 pts
Fully Prepared - Mecha Green Hill Find all 83 rings in Mecha Green Hill Zone Act 3.
5 pts
Aqua Planet Explorer - Act 1 Earn an extra life in Aqua Planet Zone Act 1 by collecting 100 rings.
5 pts
Aqua Planet Explorer - Act 2 Earn an extra life in Aqua Planet Zone Act 2 by collecting 100 rings.
5 pts
Fully Prepared - Aqua Planet Find all 14 rings and the invincibility box in Aqua Planet Zone Act 3.
3 pts
Electric Egg Explorer - Act 1 Earn an extra life in Electric Egg Zone Act 1 by collecting 100 rings.
10 pts
Electric Egg Explorer - Act 2 Earn an extra life in Electric Egg Zone Act 2 by collecting 100 rings.
10 pts
Fully Prepared - Electric Egg Find all 40 rings in Electric Egg Zone Act 3.
3 pts
Doesn't Like to Take Baths Complete Aqua Planet Zone Act 1 and 2 without going underwater.
10 pts
Firmly Grounded Defeat Turquoise Hill Zone boss without leaving the ground.
5 pts
Tree Climber Defeat Mecha Green Hill Zone boss without touching the ground after the first hit.
5 pts
Cracked Egg Defeat the upper half of the Aqua Planet Zone boss without touching the ground after the first hit.
10 pts
Bounce King Defeat Dr. Robotnik's walker without touching the ground after the first hit.
10 pts
Bested the Tracked Bug Clear Turquoise Hill Zone Act 3 without picking up any rings.
5 pts
Bested the Robo-Snake Clear Gigalopolis Zone Act 3 with exactly 5 rings.
10 pts
Bested the Pogo-Powered Robotnik Clear Sleeping Egg Zone Act 3 without picking up any rings.
10 pts
Bested the Bug-On-A-Stick Clear Mecha Green Hill Zone Act 3 without picking up any rings.
5 pts
Bested the Egg with the Deadly Centre Clear Aqua Planet Zone Act 3 without picking up any rings.
10 pts
Bested Dr. Robotnik Clear Electric Egg Zone Act 3 without picking up any rings.
25 pts
Turquoise Speedrun - Act 1 Clear Turquoise Hill Zone Act 1 with 25 seconds or less on the timer.
5 pts
Turquoise Speedrun - Act 2 Clear Turquoise Hill Zone Act 2 with 30 seconds or less on the timer.
5 pts
Turquoise Speedrun - Act 3 Clear Turquoise Hill Zone Act 3 with 25 seconds or less on the timer.
5 pts
Gigalopolis Speedrun - Act 1 Clear Gigalopolis Act 1 with 40 seconds or less on the timer.
5 pts
Gigalopolis Speedrun - Act 2 Clear Gigalopolis Act 2 with 30 seconds or less on the timer.
5 pts
Gigalopolis Speedrun - Act 3 Clear Gigalopolis Act 3 with 45 seconds or less on the timer.
10 pts
Sleeping Speedrun - Act 1 Clear Sleeping Egg Zone Act 1 with 25 seconds or less on the timer.
5 pts
Sleeping Speedrun - Act 2 Clear Sleeping Egg Zone Act 2 with 25 seconds or less on the timer.
5 pts
Sleeping Speedrun - Act 3 Clear Sleeping Egg Zone Act 3 with 45 seconds or less on the timer.
10 pts
Mecha Speedrun - Act 1 Clear Mecha Green Hill Zone Act 1 with 25 seconds or less on the timer.
5 pts
Mecha Speedrun - Act 2 Clear Mecha Green Hill Zone Act 2 with 25 seconds or less on the timer.
5 pts
Mecha Speedrun - Act 3 Clear Mecha Green Hill Zone Act 3 with 30 seconds or less on the timer.
5 pts
Aqua Speedrun - Act 1 Clear Aqua Planet Zone Act 1 with 40 seconds or less on the timer.
5 pts
Aqua Speedrun - Act 2 Clear Aqua Planet Zone Act 2 with 30 seconds or less on the timer.
5 pts
Aqua Speedrun - Act 3 Clear Aqua Planet Zone Act 3 with 50 seconds or less on the timer.
10 pts
Electric Speedrun - Act 1 Clear Electric Egg Zone Act 1 with 35 seconds or less on the timer.
5 pts
Electric Speedrun - Act 2 Clear Electric Egg Zone Act 2 with 35 seconds or less on the timer.
5 pts
Electric Speedrun - Act 3 Clear Electric Egg Zone Act 3 with 60 seconds or less on the timer.
10 pts
Taking Off to the Skies Acquire the Rocket Boots.
1 pts
The Fastest Thing Alive Acquire the Power Sneakers.
1 pts
Can't Touch This Acquire Invincibility.
1 pts
Baker's Dozen Have 13+ extra lives.
10 pts
Cat's Luck Have 9+ continues.
10 pts
Amateur Score Earn a score of 100,000.
3 pts
Expert Score Earn a score of 200,000.
5 pts
Top Score Earn a score of 300,000.
10 pts
Sonic Boom! Finish a level going at least 900 km/h.
5 pts
Sonic Whimper... Finish a level going under 100 km/h.
3 pts
Catch you on the flip side Flip a goal post on its back.
5 pts
Cha-ching! Earn 10 Rings from a goal post.
5 pts
Self-Portrait Earn an extra life from a goal post by getting your own icon.
5 pts
BFFs Earn an extra continue from a goal post by getting your buddy's icon.
10 pts
Hadouken!! Perform a familiar move on the Sound Test screen.
2 pts

Sonic Chaos leaderboard

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Sonic Chaos frequently asked questions

How do I play Sonic Chaos online with a friend?

Sonic Chaos (Master System) can be played online with friends using Etera's P2P netplay. Create a room in the launcher and invite your friend, who joins through the invite. Step by step:

Download the Etera launcher for Windows or Linux and create your account.
Ask your friend to do the same and add them to your friends list.
Pick the game in the library and create a netplay room.
Invite your friend: they accept the invite and join the room.
The launcher keeps dependencies on the same version for both players, avoiding desync.

How do I play Sonic Chaos on PC?

Download the Etera launcher (Windows or Linux), find Sonic Chaos in the Master System library and click to download. The launcher handles the emulator and setup for you.

Does Sonic Chaos netplay lag?

Etera uses a direct P2P connection between players, which usually means low latency. Results depend on each player's internet quality.

Does Sonic Chaos have achievements?

Yes, Sonic Chaos has 81 achievements worth 568 points. Achievements are counted and saved to your history and the leaderboard for subscribers and during the trial period.

Can I play Sonic Chaos for free?

Yes. Every account gets a 5-day trial with premium features. After that, the free plan allows 3 new games per day and 1 netplay session per day. Premium raises those limits.

Play Sonic Chaos on Etera

Download the launcher for Windows or Linux, find this game in the library and play solo or with friends.