Some mods are distributed as pre-patched game files. This is "portable" in the sense that you only need to move files, not run an installer. [Tutorial] How to: Install and Use TexMod!
: Download the latest TR2013 Modding Tools / Mod Manager from Nexus Mods. tomb raider 2013 how to install mods portable
Find the file named patch.000.tiger . Copy and paste it somewhere safe outside the game folder so you can revert if needed. Some mods are distributed as pre-patched game files