RimWorld just ditched Unity for its own engine, and it's up to 4× faster.

Ludeon's update 1.7 moves the colony sim to Waylith, with saves and most mods still working both ways. A 1,500-mod pack that took 14 minutes to load now takes about 6, and the studio is already building a new game on the engine. It's on Steam's unstable beta now.


