4044 Old Engine

This is the last version of old engine before the new engine version update was added to Half-Life 2, this is the main version used for speedrunning old engine. (external link)

By BitRainBitRain

Ghosting Mod (external link)

By GocnakGocnak

Source Unpack

Source Unpack is the most recent pre-SteamPipe version of Source Engine (build 5135), with unpacked HL2 and Portal included. Very useful for running. (external link)

By YaLTeR & BitRain


Citadel 02 Skip Practice Saves

3 saves to help you learn the VERY difficult citadel 02 skip. (direct download)

By IkerPineappleIkerPineapple

Practice saves

Practice saves with quickclip state (external link)

By maltemllermaltemller

Practice saves for Ghosting (updated route)

Updated route + citadel_02 save (direct download)

By FleackFleack

Save for RLD Skip

Practice it! (external link)

By MetalGioMetalGio