We also drew the line at realistic 1st person shooter games. However, medieval settings, hunting down monsters with arrows, magic, and swords, and finding loot was acceptable. Path of Exile is a free online Role Playing Game that my whole family has played together (me hubby and 3 teen boys). It's viewpoint is above the characters and the shooting/whacking/magicking things is not "realistic". Lots of character options. Lots of loot & skill strategies. You can play alone or cooperatively. Long game with maps that regenerate so you can replay areas. The storyline is dark, but it is a fantasy RPG. My hubby and two of the boys have played it a lot over the past few years.
https://www.pathofexile.com/game