https://old.reddit.com/r/Steam/comments/1i5brpb/whats_the_oldest_last_played_game_you_have_on/
Like it's this option.
mine was Just Cause 2. I recall being absolutely pissed that I need to fricking install some shit called Steam with my limited INTERNET DATA cap in addition to the files on my CD. 
Jump in the discussion.
No email address required.
Half Life 2, November 6th 2011.
I'm guess that's when the last played feature was added, because there a ton of games I know I've played which aren't shown.
Jump in the discussion.
No email address required.
More options
Context