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- Robotnik (Metallic Madness Boss)
- Robotnik (Metallic Madness boss)
- Robotnik (Quartz Quadrant Boss)
- Robotnik (Quartz Quadrant boss)
- Robotnik (Sky Base Zone Boss)
- Robotnik (Sky Base Zone boss)
- Robotnik (Spring Yard Zone Boss)
- Robotnik (Spring Yard Zone boss)
- Robotnik (Star Light Zone Boss)
- Robotnik (Star Light Zone boss)
- Robotnik (Tidal Tempest Boss)
- Robotnik (Tidal Tempest boss)
- Robotnik (Wacky Workbench Boss)
- Robotnik (Wacky Workbench boss)
- Robotnik Returns
- Robotnik Winter
- Robotnik Winter Zone
- Robotnik monitor
- Robotnikland
- Robotnikland (episode)
- Robotniks Revenge
- Robototo
- Robotropolis
- Robots From The Sky Part 1
- Robots From The Sky Part 2
- Robots From The Sky Part 3
- Robots From The Sky Part 4
- Rock'n
- Rock 'n' Sonic The Hedgehog: Sessions!
- Rock Throwing Combatant
- Rock Zone
- Rock the Rock
- Rocket Accel
- Rocket Beetle
- Rocket Launcher
- Rocket Metal
- Rocket Shoes
- Rocket the Sloth
- Rockman Chaos
- Rocky
- Rocky's Sea
- Rocky-Coaster
- Rocky Ridge
- Roger Craig Smith
- Roger Hector
- Roger Hector interview by HXC (August 2005)
- Roger Hector interview by Sega-16 (February 15, 2005)
- Roger Hector interview by hxc (August 2005)
- Roger Hector interview by hxc (October 2005)
- Roger Hector interview by hxc (September 2005)
- Rogue
- Rogue's Landing
- Rogue the Bat
- Rokkaku Hill
- Rola la Fora - Sonic the Hedgehog 2 (Supergame, February 1992)
- Role Models
- Roller
- Roller (Sonic the Hedgehog 16-bit)
- Roller mk.II
- Rolling Combo
- Rolling Mode
- Romhacking Central
- Roms
- Rooftop Run
- Rooftop Run (Sonic Generations)
- Ross Harris
- RotSprite
- Rotatatron
- Rotating spiked platform
- Rotor
- Rotor Walrus
- Rotsprite
- Rouge
- Rouge the Bat
- Rough
- Rough the Skunk
- Roulette Road
- Roulette Road (Team Sonic Racing)
- Round
- Route 101
- Route 280
- Route 99
- Route 99 Boss
- Route 99 Zone
- Route 99 Zone Boss
- Royal Chariot
- RubyEclipse
- Rugle
- Ruin Wood
- Ruin Wood Area
- Rumble Launcher
- Rumi Ochiai
- Run, Sonic, Run!
- Running Out of Time
- Rush Attack
- Rusty Rose
- Rusty Ruin
- Rusty Ruin Zone
- Rusty Ruin Zone Act 3
- Rusty Ruin Zone Badnik 1
- Rusty Ruin Zone Badnik 2
- Rusty Ruin Zone Boss
- Rusty Ruin Zone boss
- Rusty Ruins Zone
- Ryan Bartley
- Ryan Drummond
- Ryan Drummond interview by Josh AKA Knuckles Echidna
- Ryan Drummond interview by Pachuka
- Ryan Drummond interview by Reala
- Ryo Hazuki
- Ryo Hirohashi
- Ryo Kudou
- Ryoichi Hasegawa
- S&K
- S&K Collection
- S.L.E.E.P
- S.L.E.E.P.
- S1
- S1@sage
- S1EE
- S1GBA
- S1GG
- S1HL
- S1MS
- S1SMPS2ASM
- S1TCG
- S1ee
- S1mm
- S1sage
- S1sage2010
- S2
- S2AE
- S2BETA5
- S2B IRC channel
- S2B Topic 9093
- S2Beta
- S2Beta IRC channel
- S2GG
- S2HD
- S2K
- S2LD
- S2LVL
- S2MS
- S2NA
- S2RR
- S2SMTP
- S2Wai
- S2smtp
- S3
- S3&K
- S3A
- S3B
- S3C
- S3Cz
- S3D
- S3k
- S4
- SA-55
- SA1
- SA2
- SA2:B
- SA2B
- SA2 Mod Loader
- SA3
- SA55
- SA:DX
- SADX
- SADXLVL
- SADXMDL
- SADXPCTools
- SADXTweaker
- SADX Mod Loader
- SADX Tweaker
- SADXsndSharp
- SAEGA
- SAGE
- SASave
- SATSEE
- SA Tools
- SBZ
- SC-3000
- SCAA
- SCARZ
- SCD
- SCDPCSSEd
- SCDPCscr
- SCDPCsnd
- SCDPCspr
- SCHG
- SCHG Mega Drive:Mega Drive Sonic Community Hacking Guide
- SCQDB
- SCR-GP
- SCR-HD
- SCZ
- SCZ Badnik 1
- SCZ Badnik 2
- SClassic
- SDisplay
- SEGA
- SEGA AGES: Sonic the Hedgehog
- SEGA Arcade Selection D-RAM Remix
- SEGA Carnival
- SEGA Direct
- SEGA ENTERPRISES, LTD.
- SEGA Illusion
- SEGA Media
- SEGA Power Cuts 1
- SEGA Rating
- SEGA United Game Artists
- SEGA vs. Accolade
- SEGAbits
- SELL
- SET ARK
- SETedit
- SEZ
- SF-7000
- SFD
- SFGHQ
- SFR
- SFZ
- SG-1000
- SG-1000 Mark I
- SG-1000 Mark II
- SG-1000 Mark III
- SGMC
- SGens
- SHIT
- SHWP
- SHZ
- SHaC
- SIIE
- SIIE8P
- SIIJ
- SIIJ01
- SIIP
- SIIP8P
- SIMS
- SING!! Sega Game Music presented by B.B. Queens
- SJZ
- SKC-Midi
- SKCsnd
- SLEEP
- SLZ
- SMCP
- SMD
- SMF
- SMPS
- SMPS 68000
- SMPS Archive
- SMPS Z80
- SMS
- SMS Control Pad
- SMS Examine
- SMS Power
- SMS Power!
- SN76489
- SNASM68K
- SNASM68k
- SNCE
- SNCE8P
- SNCJ
- SNCJ8P
- SNCP
- SNCP8P
- SNES
- SNK
- SNN
- SOME
- SONICFAN
- SONICTEAM "PowerPlay"
- SONIC Adventure REMIX
- SONIC Adventure REMIX (promo)
- SONIC DRIVE
- SONIC RUSH Original Groove Rush
- SOST
- SPA
- SPEC
- SPG
- SPG:Air State
- SPG:Animations
- SPG:Basics
- SPG:Calculations
- SPG:Camera
- SPG:Characters
- SPG:Elemental Shields
- SPG:Game Enemies
- SPG:Game Objects
- SPG:Getting Hit
- SPG:Hitboxes
- SPG:Jumping
- SPG:Main Game Loop
- SPG:Overlay Scripts
- SPG:Player 2
- SPG:Rebound
- SPG:Ring Loss
- SPG:Rolling
- SPG:Running
- SPG:Slope Collision
- SPG:Slope Physics
- SPG:Solid Objects
- SPG:Solid Terrain
- SPG:Solid Tiles
- SPG:Special Abilities
- SPG:Special Stages
- SPG:Springs and Things
- SPG:Super Speeds
- SPG:Underwater
- SPZ
- SP Badnik
- SP Ring
- SQX
- SRA
- SRAM
- SRB2
- SRB2Kart
- SRZG
- SSBB
- SSF
- SSMB
- SSN
- SSNTails
- SSRG
- SSRG Council
- SSS
- SST
- SSZ
- SS Badnik 1
- SS Badnik 2
- SS Badnik 3
- SS Badnik 4
- SS Marine
- SS Tornado EX
- SShadowSuper
- SSonicNET
- SSonicNET Database
- SSonicNET Database:Anniversaries
- SSonicNet
- STC
- STE
- STI
- STI Burbank
- STLL
- STLL2
- STT
- STZ