: Official GOG releases typically bundle digital extras like the game manual and wallpapers. System Requirements

: While the game is DRM-free, you may need the GOG Galaxy client to access online multiplayer lobbies.

: The GOG edition is highly regarded for being DRM-free and including the critical Multiplayer Update that re-enabled online play and cross-play with Steam users.

: Use a tool like WinRAR or 7-Zip to open part1.rar ; the software will automatically pull data from the other parts to recreate the full installer.