NoNewTaleToTell: Marathon. I'm maybe fifteen, twenty minutes into the game but it seems really fun. I do wish it had quicksave though, especially since it looks like it's going to be a difficult game (in a good way).
toxicTom: Oh dear! Are you using the Aleph One port? Ever since it became free Marathon has been on the top 10 of my "todo" games, but it never managed to get to the pole position. But you just bumped it a bit :-)
I even started it many many years ago. Back then I played shooters with inverse mouse control, and I couldn't get into it because it didn't allow it. Years later OP:F made me "cured" me of inverted mouse (just wouldn't work there, with the combination of look/aim/turn). But I already had given my copy of Marathon away...
I am indeed using the Alpeh One port! Marathon has long been a game I've been interested in and today I finally decided to get off my proverbial rear and go get it working haha. I actually used to play a lot of FPS games with inverted aiming as well, when I took a short break from gaming I ditched that habit, I'm not sure why it even became a habit to be honest haha!
If it helps bump it up even further, the installation is easy as pie, just extract Marathon to wherever you want the game installed, then copy the Aleph One application into the Marathon folder and click on Aleph One's exe whenever you want to play. The controls need to be remapped just a bit to a more modern layout, but that's easily done via the in-game option menu. So far I've encountered nary a bug nor glitch.