The rcbot13.zip file you have requested: Modifications / Bots / RCBot 1.3 - 1.31mb is not available. Perhaps try browsing all files for the game Half-Life and upload any files you want to share or are missing. This is the only information we could locate:
This also includes the windows & linux DLLs for stand-alone or metamod installation. This comes with metamod support and mod support for : Natural-Selection 2 & 3, SvenCoop 2.1/3.0, BumperCars 1.5+, Deathmatch Classic, Rocket Crowbar 2, HLDM, Battlegrounds.