This set disallows Transformations, Cheats and 2P Controls. You must reset your game to re-activate achievements unless noted in the descriptions

[Sonic 1] Complete every Act [Transformations and 2P Allowed]

[Sonic 2] Complete every Act [Transformations and 2P Allowed]

[Sonic 3] Complete every Act [Transformations and 2P Allowed]

[40Mb] Complete every Act [Transformations and 2P Allowed]

[Green Hill] Complete all three Acts without losing a Life

[Marble] Complete all three Acts without losing a Life

[Spring Yard] Complete all three Acts without losing a Life

[Labyrinth] Complete all three Acts without losing a Life

[Star Light] Complete all three Acts without losing a Life

[Scrap Brain] Complete all three Acts without losing a Life

[Final] As Sonic, complete the Zone without taking any hits [No Spin Dashing]

[Emerald Hill] Complete both Acts without losing a Life

[Winter Hill] Complete both Acts without losing a Life

[Wood] Complete both Acts without losing a Life

[Sand Shower] Complete both Acts without losing a Life

[Chemical Plant] Complete both Acts without losing a Life

[Neo Green Hill] Complete both Acts without losing a Life

[Casino Night] Complete both Acts without losing a Life

[Hill Top] Complete both Acts without losing a Life

[Dust Hill] Complete both Acts without losing a Life

[Hidden Palace (S2)] Complete both Acts without losing a Life

[Oil Ocean] Complete both Acts without losing a Life

[Metropolis] Complete all three Acts without losing a Life

[Genocide City] As Sonic, complete the Zone without taking any hits

[Sky Chase] Complete the Zone without taking any hits [No Jumping | No Spin Dashing]

[Sky Fortress] As Sonic, complete the Zone without taking any hits

[Death Egg (S2)] Complete the Zone without taking any hits [No Jump Abilities | No Spin Dashing]

[Angel Island] Complete both Acts without losing a Life

[Hydrocity] Complete both Acts without losing a Life

[Marble Garden] Complete both Acts without losing a Life

[Carnival Night] Complete both Acts without losing a Life [Must defeat Graviton Mobile]

[IceCap] Complete both Acts without losing a Life

[Launch Base] Complete both Acts without losing a Life

[Mushroom Valley] Complete both Acts without losing a Life

[Flying Battery] Complete both Acts without losing a Life

[Sandopolis] Complete both Acts without losing a Life

[Lava Reef] Complete both Acts without losing a Life [Must defeat Hot Mobile]

[Hidden Palace (SK)] As Sonic, complete the Zone without taking any hits in under 95 seconds

[Sky Sanctuary] As Sonic, complete the Zone without taking any hits

[Sky Sanctuary] As Knuckles, complete the Zone without taking any hits [No Spin Dashing]

[Death Egg (SK)] Complete both Acts without losing a Life

[The Doomsday] Complete the Zone without taking any unnecessary hits

[40Mb] As Sonic, complete every Act without losing more than 3 Lives [Must complete The Doomsday | Single Session]

[Green Hill 1] Collect the first Invincibility powerup and complete the Act without it running out

[Green Hill 2] Complete the entire Act without releasing Right [No Jump Abilities]

[Green Hill 3] As Knuckles, defeat Hammerball Mobile in under 40 seconds

[Marble 1] Collect the hidden Invincibility powerup [2P Allowed]

[Marble 2] As Knuckles, complete the Act in under 24 seconds

[Marble 3] As Knuckles, defeat Fireball Mobile in under 60 seconds

[Spring Yard 1] As Knuckles, complete the Act in under 52 seconds

[Spring Yard 2] As Knuckles, complete the Act in under 35 seconds

[Spring Yard 3] Complete all three Acts without earning more than 1,000 points [No Jump Abilities]

[Labyrinth 1] As Knuckles, complete the Act in under 45 seconds

[Labyrinth 2] As Sonic, complete the Act without collecting an Air Bubble [No Aqua Barrier]

[Labyrinth 3] As Knuckles, defeat Egg Mobile before it turns to flee

[Star Light 1] Collect the hidden Speed Shoes powerup [2P Allowed]

[Star Light 2] As Knuckles, complete the Act in under 30 seconds

[Star Light 3] Defeat Mine Mobile by only attacking it indirectly [No Jump Abilities]

[Scrap Brain 1] As Knuckles, complete the Act in under 42 seconds

[Scrap Brain 2] As Knuckles, defy the Eggrobo's pitfall

[Scrap Brain 3] Activate both Star Posts without hearing the dreaded music [No Jump Abilities | No Aqua Barrier]

[Final] Defeat Piston Mobile without taking any hits [No Jumping]

[Emerald Hill 1] Complete the Act while only jumping once [No Jump Abilities]

[Emerald Hill 2] As Knuckles, complete the Act without pressing Left or Right

[Winter Hill 1] As Knuckles, complete the Act in under 30 seconds

[Winter Hill 2] Break all 6 Life Monitors without losing a Life [No Jump Abilities]

[Wood 1] Break all 4 Life Monitors without losing a Life [No Jump Abilities]

[Wood 2] Earn a Perfect Bonus with 58 or more Rings [No Jump Abilities]

[Sand Shower 1] Complete the Act while Invincible, with Speed Shoes and any Barrier active

[Sand Shower 2] Defeat Drill Mobile by only attacking it while grounded [No Jump Abilities]

[Chemical Plant 1] As Knuckles, complete the Act in under 32 seconds

[Chemical Plant 2] As Knuckles, complete the Act in under 60 seconds

[Neo Green Hill 1] As Knuckles, complete the Act without using the D-pad

[Neo Green Hill 2] As Knuckles, defeat Hammer Mobile without touching the ground

[Casino Night 1] Complete the Act without earning any points [No Jump Abilities]

[Casino Night 2] As Knuckles, complete the Act without pressing Left or Right

[Hill Top 1] Complete the Act while Invincible [2P Allowed]

[Hill Top 2] As Knuckles, defeat Submarine Mobile by only attacking while Gliding

[Dust Hill 1] Complete the Act without destroying a Badnik [No Jump Abilities]

[Dust Hill 2] Escape the dreaded spike trap [2P Allowed]

[Hidden Palace 1 (S2)] Break all 10 Monitors without losing a Life [No Jump Abilities]

[Hidden Palace 2 (S2)] Defeat Brass Mobile by only attacking while charging a Spin Dash

[Oil Ocean 1] As Knuckles, complete the Act without using the D-pad

[Oil Ocean 2] As Knuckles, defeat Submarine Mobile II by only attacking while Gliding

[Metropolis 1] Complete the Act while Invincible

[Metropolis 2] As Knuckles, complete the Act without pressing Left or Right

[Metropolis 3] Break all 6 monitors inside the hidden area

[Genocide City] Defeat Water Mobile while Invincible

[Sky Chase] Complete the Zone without destroying a Badnik [No Jump Abilities]

[Sky Fortress] As Knuckles, defeat Barrier Mobile in under 80 seconds

[Death Egg (S2)] As Knuckles, defeat Silver Sonic by only attacking while Gliding

[Angel Island 1] Travel to Angel Island without having earned any Emeralds [m]

[Angel Island 2] As Knuckles, complete both Acts by taking the upper route [2P Allowed]

[Hydrocity 1] Collect all 90 Rings suspended in the trapezium [2P Allowed | No Thunder Barrier]

[Marble Garden 1] Ride a Spinning Top into the Boss Arena [2P Allowed]

[Marble Garden 2] As Knuckles, defeat Drill Mobile in the skies

[Carnival Night 1] Bounce on Bowling Spin for at least 10 seconds [No Jump Abilities]

[Carnival Night 2] As Knuckles, defeat Graviton Mobile

[IceCap 1] As Knuckles, collect the last 10 Rings on the ski slope

[IceCap 2] As Knuckles, collect all 96 Rings in the hidden trampoline cavern [No Thunder Barrier]

[Launch Base 1] Complete the Act without triggering any alarms [No Jump Abilities]

[Launch Base 2] As Knuckles, complete the Act aboard the Death Egg [2P Allowed]

[Mushroom Valley 1] Defeat Hey Ho while preparing a Spin Dash [No Flame Barrier]

[Mushroom Valley 2] As Knuckles, complete the Act without collecting any Rings

[Flying Battery 1] As Sonic, defeat Gapsule without touching the ground

[Flying Battery 2] As Knuckles, reach the Upper Deck in under 210 seconds

[Sandopolis 1] Defeat Guardian without attacking them [No Jump Abilities]

[Sandopolis 2] As Knuckles, complete the Act without any illumination

[Lava Reef 1] As Knuckles, defy the Rock Drill's pitfall

[Lava Reef 2] As Knuckles, complete the Act without pressing Left or Right

[Lava Reef Boss] Complete the Act without taking any hits [No Jump Abilities | No Flame Barrier]

[Hidden Palace (SK)] Defeat Knuckles while Invincible [2P Allowed]

[Sky Sanctuary] Break all 16 Monitors without losing a Life [2P Allowed]

[Sky Sanctuary Boss] As Knuckles, defeat Mecha Sonic (Phase 1) by only attacking while Gliding

[Death Egg 1 (SK)] Complete the switch room in under 10 Seconds [No Partner]

[Death Egg 2 (SK)] Defeat Death Ball while only inverting gravity once

[Death Egg Boss (SK)] As Knuckles & Tails, complete both Acts [Level Select Allowed | No Pausing]

[The Doomsday] Complete the Zone in under 120 seconds

[40Mb] As Sonic, complete each S1&2 Act in under 4 minutes and S3&K Act in under 6 minutes [Must complete The Doomsday | Single Session]

[40Mb] As Knuckles & Tails, complete every Act without a Time Over [Single Session]

[Azure Lake] As Sonic, complete a Lap in under 4 seconds [Time Attack]

[Azure Lake] As Sonic, complete the Zone in under 22 seconds [Time Attack]

[Balloon Park] As Sonic, complete a Lap in under 6 seconds [Time Attack]

[Balloon Park] As Sonic, complete the Zone in under 34 seconds [Time Attack]

[Chrome Gadget] As Sonic, complete a Lap in under 7 seconds [Time Attack]

[Chrome Gadget] As Sonic, complete the Zone in under 36 seconds [Time Attack]

[Desert Palace] As Sonic, complete a Lap in under 6 seconds [Time Attack]

[Desert Palace] As Sonic, complete the Zone in under 32 seconds [Time Attack]

[Endless Mine] As Sonic, complete a Lap in under 8 seconds [Time Attack]

[Endless Mine] As Sonic, complete the Zone in under 42 seconds [Time Attack]

[Blue Sphere] Complete 14 stages in a row [No Passwords]

[Blue Sphere] Earn 7 Perfects in a row [No Passwords]

[Item Machine] Collect every type of Barrier in a single visit

[Rolling Jump] Collect two 1-Up Balls in a single visit

[Slot Machine] Collect 200 rings in a single visit

[S1 Special] Complete every Emerald maze

[S2 Special] Earn an Emerald with your partner holding more Rings [2P Jumping Allowed]

[S2 Special] Earn an Emerald without letting your partner ever collect a Ring

[SK Special] Earn an Emerald by collecting all Blue Spheres at maximum speed [No Pausing]

[SK Special] Earn the 8th Super Emerald with a Perfect by only walking backwards [Level Select Allowed | No Pausing]

From crouching, fully charge a Spin Dash in under a quarter of a second

Collect a Speed Shoes powerup with one already active

Cause Water Mobile to misfire

Destroy 10 Badniks before Invincibility expires

As Sonic, destroy 20 Badniks with the Fireball Dash in any Act without losing a Life [No Partner] {Not Launch Base 1}

As Sonic, destroy 10 Badniks consecutively with the Continuous Bound in any Act [No Partner] {Not Launch Base 1}

As Sonic, collect 200 loose Rings with the Thunder Barrier in any Act without losing a Life

Juggle a falling Signpost 30 times before it lands

Break 3 Monitors revealed by a falling Signpost before it stops spinning

Destroy 10 Badniks while having no Rings without losing a Life [No Jump Abilities | No Powerups] {Not Launch Base 1}

Earn a Perfect Bonus in any Act that has 100 or more Rings

Earn a 10k bonus for destroying a Badnik {Not Marble 2 | Not Launch Base 1}

Earn all 7 Chaos Emeralds

Earn all 7 Super Emeralds

Earn all 7 Chaos Emeralds before entering Labyrinth 2 [Single Session] [m]

Regain all 7 Chaos Emeralds before entering Marble Garden 1 [Single Session] [m]

Earn all 7 Super Emeralds before entering Flying Battery 1 [Single Session] [m]

Complete any Act with 999 rings [2P Allowed] {Not Casino Night}

Earn a total of 2.5 million points [No Spin Dash Exploit]

[Hydrocity 2] Run across a pool of water with a Flame or Thunder Barrier

Collect 100 Rings within the first 20 seconds of any Act

Collect all 3 types of elemental Barrier in any Act without taking any hits {Not Hidden Palace (SK) | Not Bonus Stages}

[Grand Prix] As Sonic, complete all Zones in under 180 Seconds [No Monitors]