Sonic Generations Collection Achievements Here is the full list of all 49 Sonic Generations Collection achievements. It takes around 20-25 hours to unlock all of the achievements on Windows.Filter Achievement View View Image viewList view Sort by TrueSteamAchievement desc TrueSteamAchievement asc Achievement name desc Achievement name asc TSA Ratio desc TSA Ratio asc Gamers desc Gamers asc Steam order Date won desc Date won asc Flag Filter All None 39 Offline Mode 3 Online Mode 7 Online/Offline 49 Single Player 19 Main Storyline 9 Collectable 1 Cumulative + 6 Time/Date Link flagsOR joinAND join Achievements without these flags What are achievement flags? Click to find outApply The Opening ActCompleted the first stage. GREEN HILL Restored! CHEMICAL PLANT Restored! SKY SANCTUARY Restored! SPEED HIGHWAY Restored! CITY ESCAPE Restored! SEASIDE HILL Restored! CRISIS CITY Restored! ROOFTOP RUN Restored! PLANET WISP Restored! Sunny side up Perfect Punisher Boom Boom Dragoon Scrap Metal Shadow Boxing Silver Got Served Treasure Hunter All Stages Clear!Cleared Sonic Generations. Greased LightningCleared Green Hill within one minute. 1 guideBright StarGot Rank S in an act. Shooting StarGot Rank S in acts three times. Blazing MeteorGot Rank S in acts seven times. Blue CometGot Rank S in acts 12 times. Big BangGot Rank S in all acts. TrickstarExecuted a trick with a seven-step combo or longer. 1 guideEradicatorDefeated 100 enemies. Ring KingReached the goal without dropping any of the rings you collected in GREEN HILL Act 1. Action HeroPerformed all of Sonic's actions in Act 2. Can't Touch ThisTook no damage while defeating the final boss. 2 guidesBonds of FriendshipCompleted all of Sonic's friends' Challenges. Walkie TalkieChatted with all of Sonic's friends you saved. Join the RanksJoined the rankings. A 30-Second TestParticipated in a 30 Second Trial. Jump for Joy!Found the spring hidden in GREEN HILL Act 1 and reached the goal with a Red Star Ring. Walk on WaterCleared CHEMICAL PLANT without entering the water. 1 guideWalk on Air The Byway or the Highway 1 guideDemolition Derby Secret Sleuth Look Both Ways A Quick Breather 1 guideColor Power! Supersonic! Mad SkillzGot all custom skills. (Hedge)Hogging It All Up!Got all collectibles. Time AttackerPlayed Time Attack on all stages. Red Ring CollectorGot all Red Star Rings. Halfway PointCleared half the missions. Mission Accomplished!Cleared all the missions.