| Achievement | How to unlock
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|---|
| (Hedge)Hogging It All Up! | Got all collectibles.
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| A 30-Second Test | Participated in a 30 Second Trial.
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| A Quick Breather | Got the Red Star Ring atop the highest spot in ROOFTOP RUN.
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| Action Hero | Performed all of Sonic's actions in Act 2.
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| All Stages Clear! | Cleared sonic generations.
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| Big Bang | Got Rank S in all acts.
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| Blazing Meteor | Got Rank S in acts seven times.
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| Blue Comet | Got Rank S in acts 12 times.
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| Bonds of Friendship | Completed all of Sonic's friends' Challenges.
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| Boom Boom Dragoon | Defeated egg dragoon.
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| Bright Star | Got Rank S in an act.
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| Can't Touch This | Took no damage while defeating the final boss.
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| CHEMICAL PLANT Restored! | Restored the CHEMICAL PLANT Stage Gate.
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| CITY ESCAPE Restored! | Restored the CITY ESCAPE Stage Gate.
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| Color Power! | Got the Red Star Ring by using an Orange Wisp in PLANET WISP.
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| CRISIS CITY Restored! | Restored the CRISIS CITY Stage Gate.
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| Demolition Derby | Wrecked 30 or more cars in city escape.
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| Eradicator | Defeated 100 enemies.
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| Greased Lightning | Cleared Green Hill within one minute.
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| GREEN HILL Restored! | Restored the GREEH HILL stage Gate.
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| Halfway Point | Cleared half the missions.
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| Join the Ranks | Joined the rankings.
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| Jump for Joy! | Found the spring hidden in GREEN HILL Act 1 and reached the goal with a Red Star Ring.
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| Look Both Ways | Reached the goal in CRISIS CITY without being hit by a tornado-carried car.
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| Mad Skillz | Got all custom skills.
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| Mission Accomplished! | Cleared all the missions.
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| Perfect Punisher | Defeated perfect chaos.
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| PLANET WISP Restored! | Restored the PLANET WISP Stage Gate.
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| Red Ring Collector | Got all Red Star Rings.
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| Ring King | Reached the goal without dropping any of the rings you collected in GREEN HILL Act 1.
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| ROOFTOP RUN Restored! | Restored the ROOFTOP RUN Stage Gate.
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| Scrap Metal | Defeated metal sonic.
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| SEASIDE HILL Restored! | Restored the SEASIDE HILL Stage Gate.
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| Secret Sleuth | Got the Red Star Ring located in the hidden room in SEASIDE HILL.
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| Shadow Boxing | Defeated shadow.
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| Shooting Star | Got Rank S in acts three times.
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| Silver Got Served | Defeated silver.
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| SKY SANCTUARY Restored! | Restored the SKY SANCTUARY Stage Gate.
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| SPEED HIGHWAY Restored! | Restored the SPEED HIGHWAY Stage Gate.
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| Sunny side up | Defeated death egg robot.
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| Supersonic! | Cleared a regular stage as Super Sonic.
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| The Byway or the Highway | Got the Red Star Ring located on the shortcut route in SPEED HIGHWAY.
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| The Opening Act | Completed the first stage.
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| Time Attacker | Played Time Attack on all stages.
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| Treasure Hunter | Collected all the Chaos Emeralds.
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| Trickstar | Executed a trick with a seven-step combo or longer.
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| Walk on Air | Cleared SKY SANCTUARY without falling even once.
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| Walk on Water | Cleared CHEMICAL PLANT without entering the water.
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| Walkie Talkie | Chatted with all of Sonic's friends you saved.
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