Some of you ancient gamers may remember X-COM. Turn-based, squad-based, tactical goodness. I still recall the fun of tossing an alien grenade into a house just to see how many walls I could blow out. (“Sorry about your house ma’am. Just doing our job.”) Sadly the series went South with X-COM Apocalypse when the developers decided they had to jump on the real-time strategy bandwagon. It wasn’t the worst implementation of RTS that should have been turn-based, (That honor belongs to Star Wars Rebellion in my opinion.), but now Firaxis is rebooting the series with a face-lift, some reimaginings, while (as far as I can tell) remaining true to the spirit of the original. Here is a good history of the series:
Most appealing to me, is that you get the same game whether on the PC or a gaming platform (minus the modability).
Now, if you really insist on reliving the old days other than booting up the original, try Xenonauts.