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Dev Who Ported RuneScape to Mobile Shares Hard-Won Technical Lessons

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A developer who worked at Jagex Games Studio between 2017 and 2019 has shared detailed technical lessons from leading the effort to bring the 20-year-old MMORPG RuneScape to iOS and Android. The project required full cross-platform parity, meaning mobile players needed access to every feature available on desktop within the same shared live world. A pre-development audit of the legacy codebase uncovered critical obstacles, including hard-coded screen dimensions, mouse-dependent input logic, and memory usage patterns incompatible with mobile hardware limits. The audit took several weeks but was credited with preventing months of costly problems during production. The developer, now at Ocean View Games, says these experiences directly shape how the studio currently approaches mobile ports and legacy codebases.

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