Thief Gold's new GOG Preservation update bakes in the essential community mods

GOG has released a video breakdown detailing the technical upgrades and integrated community mods included in the new Preservation Program release of Thief Gold. The stealth classic officially joined the program today after winning the storefront's first community Patron vote.

According to GOG's latest update, the preserved build eliminates the need for manual patching. Having the NewDark 1.27 engine update baked directly into the installer is a massive convenience. The package also integrates Peter Wright's Thief Gamepad Mod, which uses GOG's input wrapper to add native modern controller support.

Fixing the Dark Engine

The NewDark engine is a community-developed patch that modernizes the original Dark Engine. Before this GOG update, players had to manually download and configure NewDark just to get the game running properly on modern hardware without crashing or stretching the aspect ratio. Now, the GOG installer handles all of that automatically, guaranteeing compatibility with Windows 10 and Windows 11. It also resolves long-standing high-refresh-rate display bugs that plagued older versions.

GOG launched the Preservation Program in late 2024 to ensure classic PC titles receive ongoing technical support. Thief Gold is the first game brought into the program specifically through a community Patron vote. The vote results show how much demand still exists for the 1999 release.

The definitive 1999 edition

Developed by Looking Glass Studios and published by Eidos Interactive in October 1999, Thief Gold expanded on the 1998 original, Thief: The Dark Project. It added three major campaign levels, including the infamous Thieves' Guild, alongside core engine fixes and extra enemy types.

The game established the foundation of the immersive sim genre. It put players in the boots of Garrett, a master thief navigating a dark fantasy steampunk world. Instead of shooting everything that moves, players had to shoot water arrows at torches to create shadows and moss arrows at tile floors to muffle their footsteps. It was a radical departure from the fast-paced shooters of the late nineties. The game introduced light-based visibility meters and surface-dependent footstep acoustics that defined first-person stealth.

Looking Glass Studios eventually shut down in May 2000 due to financial troubles, but its design philosophy heavily influenced modern immersive sims like Deus Ex, BioShock, and Dishonored. The Thief series itself continued under different developers, with Ion Storm handling 2004's Deadly Shadows and Eidos-Montréal taking over for the 2014 reboot.

$6.99 on PC

The updated PC release costs $6.99 on GOG, though it frequently drops to $1.75 during store sales. The update includes multi-language support for German, French, and Polish.

For players who prefer classic games untouched, GOG includes an option to launch the un-upgraded pre-Gold original directly from the launcher. The original release is notoriously finicky on modern systems, so having it available as an untouched baseline is a nice touch for software historians. Players can see exactly what Looking Glass shipped before the community spent two decades fixing it.