Bottles 66.0 was released on August 11, 2026, featuring significant updates like UMU launcher integration and ProtoSoda as the default runtime, along with an experimental cpak package format. Following the major release, the development team quickly implemented six hotfixes within 28 hours to address various issues such as Flatpak path regressions and Steam runtime arguments. This rapid response not only stabilized the new features but also attracted two new developers to the project. Users can now update to version 66.6 via Flathub, though the quick succession of hotfixes may result in a somewhat disjointed user experience for those monitoring changelogs

Bottles 66.6 Drops Six Hotfixes in Under 28 Hours

Bottles 66.0 lis now available, introducing UMU launcher integration, ProtoSoda as the default runtime, and an experimental cpak package format. Instead of letting the major release settle, the team pushed five consecutive hotfixes between August 12 and August 14 to patch Flatpak path regressions, Steam runtime argument handling, and DLL case sensitivity issues. The intense two-day sprint not only stabilized the new features but also brought two new developers into the contributor ranks. 

Bottles 66.6 Drops Six Hotfixes in Under 28 Hours @ Linux Compatible