Although the game I’ve played the most over all my years and outside of steam is definitely Deus Ex. I’ve put a lot of time into it exploring the single player, playing the multiplayer, and messing around with mods since it came out in 2001. The same would go for Unreal Tournament 2004 which I easily had over a thousand hours in back in high school, before steam was a thing.
My top three according to steam are:
Although the game I’ve played the most over all my years and outside of steam is definitely Deus Ex. I’ve put a lot of time into it exploring the single player, playing the multiplayer, and messing around with mods since it came out in 2001. The same would go for Unreal Tournament 2004 which I easily had over a thousand hours in back in high school, before steam was a thing.