Simon White*
Jason's Gem

At a glance
Genres
- action game
- Action*
- platform game*
- shooter game*
Play modes
- single-player video game
- Single-player*
Game facts
Developers
- Simon White*
Publishers
- Mastertronic
Platforms
Players by platform
- ZX Spectrum*
- Maximum players (mode unspecified)
- 1*
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* Provisional data