Got this from Reddit.
Game activates on uPlay, not Steam (Steam version still requires uPlay to run.
Cost is $35BRL or about $17.15 AUD
They accept Paypal and credit cards.
Deluxe Edition costs $19.64: http://www.nuuvem.com.br/produto/766-far-cry-3-deluxe-editio…
which includes (translated through Google)
The Monkey Business Pack: Meet Hurk and his monkey bomb in four sweltering missions and get 2 new ways to humiliate your friends in multiplayer mode.
The Lost Expeditions: Discover the secrets of the ruins on the islands lost in World War 2 missions of action and suspense and release the power of a shotgun in one hand in multiplayer mode.
The Warrior Pack: Lay the fear in your enemies with a knife and get exclusive early access to an editor tattoos multiplayer mode. The Predator Pack: Capture 4 ferocious animal with a rifle M-700 Predator in singleplayer and silently kill opponents with the bow unlocked Predator multiplayer mode.
ewww uplay might as well just pirate it.