Hello, I was wondering how you can get this (or any version of it) overlay during speedruns which I have seen many speedrunners use? I cant find any guides for it.... The one below is Muty's.

Download Livesplit, than you can watch tutorial how to set splits up.

^ also you can't draw LiveSplit over Half-life if it's in full screen mode. Put LiveSplit on second screen or use windowed mode for Half-Life.