Simon Thomley, professionally known as Stealth, is an independent game developer and programmer. He created his own company called Headcannon and has developed games for the Sonic the Hedgehog series.
Development and programming
- Sonic the Hedgehog (2013 re-release)
- Sonic the Hedgehog 2 (2013 re-release)
- Sonic Mania (2017)
- Sonic Mania Plus (2018)