Tomb Raider (2013) is a pretty good and entertaining 20 or so hour game. It's unfortunately not as open-ended and puzzle solving based as the classic games, and other than the main story that involves shooting bad guys and watching cutscenes; the only other content are collectibles that give you XP and more story exposition. I tried 100%-ing the game but just found it too boring since audio tapes just expand on the story that already is pretty forgettable.

If you're looking for a good singleplayer game to sink a few days into for a reasonable price, you could do much worse than Tomb Raider.