AirAttack HD vs Portal 2
AirAttack HD
AirAttack HD is an award-winning vertically-scrolling, top-down arcade shoot-'em-up where you get to assume the role of an up-and-coming ace pilot. Featuring an intense, bullet-hell-like gameplay, you'll get to fight against a wide variety of enemies while piloting a nice selection of unique aircrafts which you upgrade and customize to your liking as well. The game is a mainly single-player game and as such, it offers plenty of exciting missions for you to embark on, each of which has 3 difficulty modes. Aside from campaign missions, there are even arcade and survival modes for you to truly put your skills to the test.What makes AirAttack such a popular game though is not only because of its real-time physics and destructible environments, but also because of its intuitive combat which is delivered through a whopping 7 control types - Touch, Relative, Tilt, Joypad, Mouse, Keyboard, and Gamepad. Having a World War theme helps a lot as well!
AirAttack HD is a somewhat older mobile game though and as such, its graphics might not be comparable to its latest sequel, AirAttack 2, but overall, the original AirAttack is still a very entertaining game to play and it manages to hold up to today's arcade standards.
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.