One of the best game mechanics Ubisoft ever pioneered was their idea of having your map procedurally unlock as you conquer various checkpoints along the way. Granted it's since been applied to everything from Watch Dogs to The Crew, but amongst all their software-sharing output, it's Far Cry that reigns supreme. It doesn't matter whether you're playing 3 or 4 really, they're very much the same experience in terms of nailing the feel of combat and the possibilities therein. Maybe you waited until nightfall, hunkered down and sleuthed your way in, knife-in-hand, tagging and stabbing enemies before disappearing without a trace? Or did you get your hands on a mortar, sniper rifle and a string of explosives, barrelling your way through and blowing everyone to smithereens before they even knew what hit them? Whichever it was, both Far Crys were perfect examples of games where these isolated experiences can be just as enjoyable as the scripted stuff put into the campaign.