Portal 2 vs XCOM: Enemy Unknown
Portal 2
Portal 2 follows in the footsteps of the award-winning original while continuing the story of Chell and Glados. Now with both single player and a 2-player cooperative mode, Portal 2 ramped up its game with a plethora of new, challenging puzzles, a storyline that's a lot richer than before, and more advanced and realistic physics that will govern your gameplay. Interestingly, the game also includes editing tools, allowing players to create their own puzzles which can then be shared for all to enjoy.Portal 2 is definitely a much better game in the series and if you fancy giving this franchise a chance, you might want to jump straight to Portal 2.
XCOM: Enemy Unknown
XCOM: Enemy Unknown puts you in charge of a secret paramilitary organization known as XCOM and as its commander, you'll need to build a functional base, manage your resources, constantly improving your technology and give tactical orders to your team when taking on a global alien invasion. The game is, obviously, part of the award-winning turn-based strategy game franchise, XCOM, which is famous for its incredible action sequences, as well as squad management and turn-based combat systems. The game will also see you as a diplomat of sorts as you'll need to interact and negotiate with various governments during your missions.XCOM: Enemy Unknown is one of the best turn-based strategy game there is (and yes, this means until now). However, the game can be quite difficult especially for newcomers to get into, and to truly appreciate the details and the flawless gameplay mechanics, you might need to put in quite a bit of time into the game. But if you do all of that, you'll be richly rewarded with one of the best gaming experience you'll ever get.