Gaming Achievements
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Sonic the Hedgehog
Platform: Master System
Genre: Platformer
Release date: October 25th, 1991
Developer: Ancient
Publisher: Sega

List of achievements:

Welcome to South Island
Complete Green Hill Zone

Best BGM
Complete Bridge Zone

Angel Falls
Complete Jungle Zone

The Danker Deeps
Complete Labyrinth Zone

Scrap Maze Zone
Complete Scrap Brain Zone

Thundar, Rain, 'n' Lightnin'
Complete Sky Base Zone Act 1

South Island Hero
Complete the Game

Gem Shopping
Find your first Chaos Emerald

To Infinity
Find all 6 Chaos Emeralds

South Island Saviour
Complete the Game with all 6 Chaos Emeralds

One Credit Finish
Complete the Game without dying.

Hedgehogs are Master Foragers
Find all 18 1up monitors, one in each level.

Careful Hedgehogs
Get 20 lives

Tastes like Neon
Complete 1 Special Stage

Electric Boogaloo
Reach the 5th Special Stage

8 bit Spinball
Complete 4 Special Stages

Nights into Dreams
Complete all 8 Special Stages

Star Spangled Hog
Get 8 Continues

Sonic and the Secret Rings
Get a 10 Ring bonus from a signpost.

Say Cheese!
Get a 1up bonus from a signpost.

South Island Superstar
Win a 500,000 point Special Bonus (18 1ups, 6 emeralds, 0 deaths, 8 sp. stages)

South Island Ninja
Complete the game with LESS than 20,000 points

Boost Mode
Get a 30,000 point time bonus on any stage except Green Hill Act 1