It's odd seeing Counterstrike because I haven't really done gaming (and certainly not FPS) since Counterstrike was a free mod to Half Life.
Wikipedia tells me that "window" of time was a year or two
Wikipedia tells me that "window" of time was a year or two
One copy of the Half Life box set (with Blue Shift, Opposing Forces, etc) could basically become as many copies as the whole thing.
I turned that one box set into several Steam accounts for my friends/I to share. Each 'mod' (turned game) basically granted a new Half Life license and cloned the derivatives
That was not included as part of that bundle.. but if you used the dedicated server tool to download the czero mod and copied it to your halflife folder you could play both the single player and multiplayer version on steam