In this little fast video i'll show you how to enable autosave in HL:S. I made this video because i wanted it to autosave in half life 1, but when i started the game it didn't autosave and i died and started 3 levels back in the game -.-
Another way you can do this is to write sv_autosave 1 in console. My method is every time i start half life it automatic enable autosave