By connecting your smartphone and your friend's smartphone to the same hotspot / WiFi (not internet connection require) you can compete to be the fastest completing a puzzle. The winners may share the results (in picture form) to social media such as Facebook, twitter and etc. Even so you can play the game in single player.
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The Amazing Spider-Man 2 Android Free
Become the Amazing Spider-Man in this open-world 3D adventure full of crime-fighting
Sonic and Knuckles Sonic Free
The game follows both Sonic the Hedgehog and Knuckles the Echidna in their respective quests