You can play FIFA on your phone. But the best mobile games are ones that were developed especially for the platform. Games like Alto's Adventure. This endless runner is endlessly engaging, with crisp visuals, addicting gameplay, and a fun story that sees you and your snowboard crossing an alpine wilderness, rescuing llamas, and outwitting pesky mountain elders. It also boasts original music and audio, and costs only two bucks. Buy it, throw on your headphones, and enjoy.