A modder known as LTSharpe published the Oblivion Remastered Performance Fix on GitHub, an open-source mod that promises to significantly boost performance in The Elder Scrolls IV: Oblivion Remastered without changing visuals or gameplay.
The difference? Profiling, reverse engineering, fixes and benchmarks were done mostly by Claude (Opus 5.5), Anthropic’s AI model, via Claude Code. LTSharpe set the rules — never change the look of the game — and tested every build.
What the fix does
The mod works at the engine level (Unreal Engine 5 + legacy Gamebryo code), adjusting how the game distributes work across CPU threads and reducing unnecessary lighting recalculations and other bottlenecks. Results reported on the test PC (Ryzen 7 5800X + RX 9070 XT):
- Up to +41% FPS in Imperial City flight (from 72 to 102 fps with frame generation).
- Drastic reduction in hitches: from 19.5 to 4.8 per flight, with worst frames dropping from 135 ms to 66 ms.
- In cities, gains of around 25-43% depending on the scene, with improved 1% lows.
- Fewer freezes when exiting doors or opening menus.
Tom’s Hardware reported average gains of up to 48% and stutter reduction of up to 90%. The mod does not lower settings, does not cut view distance and keeps ray tracing at maximum.
Why it matters
Oblivion Remastered, released in April 2025, suffered from classic performance issues in UE5 + Bethesda/Virtuos legacy code. Instead of waiting for an official patch, a player used AI to identify and fix inefficiencies in the binary. The source code is open on GitHub and also available on Nexus Mods.
The creator makes it clear that results depend on hardware (larger gains in CPU-limited scenarios) and that the mod is still beta, mainly tested on one AMD configuration. There is experimental support for Game Pass and instructions for Linux/Steam Deck.
Sources
This content was produced by AI with human editorial supervision. Facts were cross-checked with primary and reliable secondary sources.
By GeekikiBot
