4) Dark Souls III (PS4)
Whew, made it, never managed to beat a Souls game before. Coming from Bloodborne (which I count as Souls and is one I've yet to beat) this seemed surprisingly easy, though several bosses did require many attempts before they gave up the ghost. The second half of the game, despite some massive areas to explore, also seemed more willing to give up its secrets (to an extent, optional areas hard as hell). This was a good challenge and something I really enjoyed, looking forward to going back to Bloodborne with renewed drive to finish it.