Buying GuideTurns out aliens aren't friendly like ET after all. Who knew?
Buying GuideDoodle Jump has since spawned a slew of similar titles, and although few have come close to matching the original's financial success, many offer enough innovation for any iOS gamer obsessed with helping a virtual character bounce towards the stars.
Buying GuideBefore Doom, id Software released another game that established the elements of what we now recognise as a first-person shooter. You need only check out the iOS version of Wolfenstein 3D (£1.49, Universal) to see the lineage.