RimWorld developers replaced the game's engine with an in-house engine, increasing performance by 2-4x.

"RimWorld moves to in-house engine, runs 2-4x faster" — 80 Level · Graphics & VFX

13 Oct 2026

What it means

RimWorld, the popular colony-sim game, is moving from the game engine to a new called the Waylith Engine, as part of Update 1.7. The developers claim this makes the game run 2-4x faster, especially in late-game colonies with many characters and , while keeping saves and most mods compatible. The update is available now on a public branch for testing.

Accuracy & sourcesGrounded

The claim comes directly from the developer Ludeon Studios' announcement on Steam and social media, and is corroborated by multiple gaming outlets (PC Gamer, Rock Paper Shotgun) that report similar performance improvements in their own tests. The 2-4x figure is the developer's own measurement, so it's solid as a claim but not independently verified.

How new

Genuinely new: the announcement and coverage all appeared on October 13, 2026.

RimWorld developers replaced the game's engine with an in-house engine, increasing performance by 2-4x.

What it means

Accuracy & sourcesGrounded

How new

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