This page contains a list of bugfix guides for you to apply to your disassembly of Sonic 1. These guides only address fixes for bugs contained within the original game, not for bugs that come as a result of mods made for S1Fixed. Such bugs will be addressed within the mod guides themselves.

• Bottom Boundary Fixes
• Buzz Bomber Missile Position Fix
• Caterkiller Collision Fix
• Control Lock Jump Fix
• Death Routine Solidity Fix
• Demo Playback Fix
• Delete and Display Fix
• Drowning Bugfixes
• Ducking Size Fix
• Final Zone Boss Hit Count Underflow Fix
• Final Zone Eggman Laughing Fix
• Final Zone Plasma Ball Fixes
• Game/Time Over Fixes
• Hidden Points Fix
• Horizontal Scrolling Fixes
• Lives Over/Underflow Fix
• Look Shift Fix
• Lost Ring Bugfixes
• Player Floor Collision Fixes
• Player Speed Bugfixes
• PLC Queue Shifting Fix
• PLC Race Condition Fix
• Prevent DLEs in Special Stage and Title Screens
• Proper Invisible Solids Detection While Ducking
• Proper Push Sensors While Rolling
• Properly Angled Running Animations
• RAM Clearing Fixes
• RememberSprite Fix
• Rolling Jump Landing Fix
• Rolling Speed Cap Fix
• Rolling Turn Around Fix
• SBZ Trapdoor Display Fix
• Screen Scroll While Rolling Fix
• Shield Positioning Fixes
• SLZ Pylon Fix
• Sonic Pushing and Walking Animation Fixes
• Sonic S-Tunnel Flicker Fix
• Special Stage Jump Physics Fix
• Speed Shoes at Signpost Fix
• Spike SFX Fix
• Spring Direction Fix
• Stock Sound Driver Fixes
• Top Boundary Fix
• Top-Right Corner Reloading Glitch Fix
• Underwater Hurt Fix
• Vertical Scrolling Fix

These will be catalogued in a separate section due to the scope.

A compilation of fixes pertaining to art, sprite mappings, PLCs, and animation files, can be found on this page. (To-Do: Add Naoto's wing position adjustment)

• Removing Misplaced Objects
• Low Signpost Fixes
• Top Boundary Exploit Prevention(!)
• GHZ2 Spring Fix
• GHZ3 Underlayer Obfuscation (lower area after the monitors and spring)(!)
• GHZ3 Wall Solidity
• MZ2 Layout Extension
• LZ3 Zip Prevention
• SLZ Solidity Fixes
• SBZ1 Glitched Monitors
• Final Zone Death Prevention

More to come!