What's new in 'Shooters'

The type of (PC, Xbox) games I have enjoyed and their general genealogy are as follows. I wish I had my Atari 800 or 1200 ... oh well. I first got hooked on Unreal Tournament when that was the whole name (and all the versions up to present). From there I branched out to other shooters like the original Half Life (and all the versions up to present). There were a lot of these around like Doom and Castle Wolfenstein that were iffy to me. Eventually my teen age Son got me to playing Left 4 Dead (and 2). I had tried BioShock (and 2) and couldn’t get into them until said Son explained a few things to me. However, I never developed a liking for strategy games or shooters with a military theme. Strange that: I hate ‘War’ … but I love to kill for a ‘good’ cause’ … usually my survival, hahaha. Well that is the short version of the games I liked best. I am going to upgrade my computer next year to be able to enjoy the newest shooters and such. I just haven’t been following things since … well BioShock. Any recommendations would be appreciated.