Putt Putt Saves the Zoo is one of the best games in existence, while people might argue that GTA or Elder Scrolls is better, they clearly haven't played Putt Putt.

Pros:
Cheap ($6.99) [2.79 at the time of this review]
Teaches you how to drive
Great dialogue
Intense gameplay featuring the life and death situations of baby animals
A++ voice acting from some of the best in the business
Fun minigames for some side action
Fluid animation
Brilliant storyline
HOT ZIGGITY

Cons:
Bugs (i encountered one animation glitch with the lion cub, which did not affect gameplay)

TL;DR:
A 12/10 game for a cheap price that will make your friends jealous.