The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Sonic Generations (console/PC) locations (2 members)
- Sonic Generations (console/PC) texture images (1 member)
- Sonic Heroes (6 members)
- Sonic Heroes moves (2 members)
- Sonic Jam (1 member)
- Sonic Jam (Game.com) (1 member)
- Sonic Jump (1 member)
- Sonic Jump (2012) (2 members)
- Sonic Jump Fever (1 member)
- Sonic Labyrinth (2 members)
- Sonic Lost World (1 member)
- Sonic Lost World (Nintendo 3DS) (5 members)
- Sonic Lost World (Wii U) (5 members)
- Sonic Mania (7 members)
- Sonic Origins (1 member)
- Sonic Pinball Party (3 members)
- Sonic Prime (1 member)
- Sonic Prime moves (1 member)
- Sonic Prime vehicles (1 member)
- Sonic R (4 members)
- Sonic Racing (1 member)
- Sonic Riders (7 members)
- Sonic Riders: Zero Gravity (5 members)
- Sonic Rivals (5 members)
- Sonic Rivals 2 (5 members)
- Sonic Rumble (3 members)
- Sonic Runners (7 members)
- Sonic Runners Adventure (5 members)
- Sonic Rush (7 members)
- Sonic Rush Adventure (8 members)
- Sonic Shuffle (2 members)
- Sonic Speed Simulator (6 members)
- Sonic Spinball (16-bit) (3 members)
- Sonic Spinball (8-bit) (4 members)
- Sonic Superstars (8 members)
- Sonic Team (5 members)
- Sonic Underground (1 member)
- Sonic Unleashed (Wii/PlayStation 2) (5 members)
- Sonic Unleashed (Xbox 360/PlayStation 3) (5 members)
- Sonic X (1 member)
- Sonic X Shadow Generations (3 members)
- Sonic and the Black Knight (3 members)
- Sonic and the Secret Rings (4 members)
- Sonic game characters infoboxes (5 members)
- Sonic robots (1 member)
- Sonic the Fighters (6 members)
- Sonic the Hedgehog (5 members)
- Sonic the Hedgehog: The Movie (2 members)
- Sonic the Hedgehog (16-bit) staff (3 members)
- Sonic the Hedgehog (1991) (5 members)