Patch 1.0.25859 Hotfix
Two days after the July 16, 2026 version 1.0 launch, Prideful Sloth shipped build 1.0.25859 as a stability hotfix on PC and console branches. Community reports and press roundups highlight two fixes: Steam achievements now register for co-op clients (not just the host Mayor), and a rare crash that could corrupt save files on exit was closed. No new features — install this before achievement hunting in four-player sessions or after Switch sleep-resume quirks.
What changed
Multiplayer achievement unlock: Vice-Mayors and remote clients who complete criteria (rock-paper-scissors emotes, co-op milestones, etc.) should see Steam or platform achievements pop on their profile after patching. Host-only credit was a launch-week regression fixed here.
Save stability: a rare corruption path on crash or abrupt quit was patched. Still back up saves before major terraforming — co-op/permissions and manual saves remain best practice.
- Update before co-op achievement runs
- Backup saves via Steam Cloud or Switch export
- Feature content unchanged from 1.0.25831 — see updates/patch-1-0-25831
Co-op achievement tips
Split-screen on Switch or PC with two controllers lets one mayor emote rock-paper-scissors solo for certain trophies — developer staff confirmed on Steam discussions. Online four-player still requires each player on the updated build.
See co-op/online-setup and co-op/local-co-op for session setup; achievements bind per platform account, not per Town Profile.
If problems persist
Missing Townies or flickering tourists after co-op menus may be sync bugs rather than corruption — save, fully quit, reload. Character disappearance guides recommend organized zones and avoiding customization menus during train events.
EA towns remain on ggt_legacy — this hotfix applies to 1.0 branch saves only — updates/legacy-saves.
Patch order for new mayors
Install 1.0 base → allow Steam or eShop to grab 1.0.25831 content → apply 1.0.25859 hotfix automatically when updates enabled. Wiki feature pages assume 25831+25859 unless noted.
| Build | Date | Focus |
|---|---|---|
| 1.0 launch | Jul 16, 2026 | Creative Mode, Treasure Hunting, economy |
| 1.0.25831 | Jul 16, 2026 | Tech Tree rebuy, Export removal, fishing buffs |
| 1.0.25859 | Jul 18, 2026 | Co-op achievements, save crash fix |
| 1.0.25886 | Jul 20, 2026 | Garbird balance, tutorial fixes, Imports App |
| 1.0.25917 | Jul 22, 2026 | Vehicle import cap, train station, co-op polish |