I played it a ton when I was 12-17, I think it came out when I was 10 or so. But I loved messing around in it and playing The Specialists mod with friends. That was my first game on Steam and it will always have a special place in my memory and heart.
Save yes, close no. But I’ve also not had as much time lately to play, so to preserve some battery life, I do a complete shutdown when I’m done playing. I’ve had several times lately where I have a week or so between when I can play, and I go to play just to find out the battery died in suspend.