Port of Xash 3D to chrome.
Place the Valve folder from your copy of Half-Life into the Xash folder. Then launch Xash and you should be good to go.
Place the mod folder in the Xash folder. Then add the following the the command line at the end of the launch options:
-game (mod foldername here)
-Mousepad doesn't work
-Skybox is black on some maps.