IfSunSets Build 17115599, released on January 24, 2025, by developer Polymorph, focused on backend stability and file optimizations . While lacking a detailed public changelog, the update included modifications to core game files ( IFSS-Windows.pak , .ucas , .utoc ) following a major content update on January 10, 2025 . For the latest update details, visit SteamDB . IfSunSets update for 24 January 2025 - SteamDB

As the sun sets on the old, broken builds, Build 17115599 finally makes the dawn feel survivable—and that, in the world of survival games, is the highest praise one can offer.

The roadmap suggests that Build 17115599 is the final "stability" patch before the update (estimated December 2023). That update will add:

If you dropped IfSunSets three months ago because of performance stutters or the boring night-time loop, fixes the two biggest pillars of the game.

Ensure you are running the correct version:

The most controversial element of IfSunSets has always been its fear meter—a sanity-like stat that depletes in darkness or near monsters. In prior builds, fear drained so rapidly that exploring interior environments (caves, shipwrecks) was functionally impossible without endgame gear. Build 17115599 recalibrates this by introducing two new variables: and sound masking .

Before dissecting the specific build, it is essential to understand the game’s foundation. drops players onto a mysterious island filled with ancient ruins, terrifying monsters, and the constant pressure of time. Unlike standard survival games where the goal is simply to exist, IfSunSets adds a narrative layer steeped in magic and mystery.

The reaction to has been "overwhelmingly positive" (94% of 1,200 recent reviews).

If you are updating your client or hosting a dedicated server, here are the technical details you need.