Team Fortress 2 is a good choice. I used to play it when I was getting into PC gaming but still only had integrated graphics. I recently got back into it, since it's pretty much the only FPS I really enjoy. The game hasn't had updates in a while, but it still has a dedicated player base.
KingCyrus20
joined 2 years ago
I've been using it in the beta for a while. The new overlay is definitely the biggest improvement for me. Everything is snappier, and the new notes feature is nice. It initially didn't have the ability to show players in the same lobby as you like the old overlay (in games that supported it, like TF2). But they re-added it after some feedback.
The fewest bugs that their QA team has found, but everyone knows the real QA testing starts on release day.
Source
It's a shame that Reddit's greed has even prevented them from considering reasonable options like revenue sharing.