I have always (ok, apart from FC2, obvs) enjoyed the Far Cry games.
Ok, hang on... FC6 is awful too. But...
apart from those two, I've always... ok,
nearly always enjoyed Far Cry games. Craft upgrades, take over bases, rinse, repeat. Scratches my make-the-numbers-get-bigger itch nicely. Recently I paid not a lot for Primal. And today I rode a mammoth into a hostile base, jumped off and hid while the mammoth killed everyone and took over the base for me. Cheers, Jumbo! I've not had so much fun
not doing anything for a long time!
I also like the way Primal has forced me to use a bow. I always plan to use a bow in the modern game, but I like a sniper rifle and very safe distance far too much!
Last game I played before that was Fallout 3, but if rumours about the modernised version are true, I wish I'd waited a bit longer before rebuying it (I had it on a disk at some point and got rid of it long ago).