Far Cry 3 Deluxe Edition for PC includes:

The Monkey Business Pack
Meet Hurk and his explosive bomb-carrying monkey in four heart-pounding missions and get two bonus ways to humiliate your friends in multiplayer

The Lost Expeditions
Discover the secrets of the island’s lost World War II ruins in two suspenseful action missions, and unlock the power of a shotgun in a one-handed flare gun in multiplayer.

The Warrior Pack
Strike fear in your enemies with an exclusive dagger and get an early unlock of the tattoo editor in multiplayer.

The Predator Pack
Hunt four ferocious animals with the M-700 Predator Rifle in single-player and silently kill opponents with the unlocked Predator Bow in multiplayer.

Also included
The Survival Guide artbook (pdf file): Discover unique artwork and insider information to help you survive the insanity of the island.

The game soundtrack.