: Loading texture packs, character skins, and custom loading screens.

Released on May 12, 2009, this version bundles the original game with specific additional content:

: Built directly into the disc, adding the Survival Mode and 16 new maps.

: Despite the "Game of the Year" branding, it does not include later paid DLCs like "Crash Course" or "The Sacrifice". JTAG/RGH Context

: Running homebrew tools like "Left 4 Dead Cheater" to enable non-host mod menus, even in online settings.