7. Plants vs Zombies
Imagine how boring your commute to work would be without this. While mobile gaming has seen a plethora of 'Tower Defence' style games flood the market over the years, PopCap's attempt had a few things going for it that set it above the pack - namely charm, variety and a lot of personality. Zombies aren't interested in nutritious veg, they just want your sweet sweet innards, so what's a better form of defence than a pea-shooter or a Venus Fl--zombie Trap? Adding to the game's charm is the varied cast of zombies, ranging from Thriller-esque Michael Jackson ones to aquatic zombies that ride dolphins - all amusingly animated.