Cytus vs Portal 2
Cytus
Cytus is a fun and challenging, rhythm mobile game that has a rather striking futuristic/sci-fi theme and an intriguing story about how future robots try to save the human emotions they contain from being erased by storing them in the form of music. Cytus is the place where the music will eventually be kept.In terms of gameplay, the controls are easy to learn since there are, at most, 3 types of notes, but there are multiple ways of tapping on those 3 notes. Aside from its intuitive Active Scan Line system, Cytus also features over 200 songs and 400 variations of said songs. However, don't expect to be bip boppin' to the latest hits though. The songs are mostly just music (no singing) and they are often from the dance/electronic genre, though there are some from other genres, like pop, jazz, and trance, too.
Cytus is perhaps the first mobile game of its kind to include a really profound storyline in addition to its incredibly-addictive rhythm-based gameplay. If you're looking for a fun rhythm game for your mobile, this is definitely a game you'll want to play.
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.