->''"Did I ever tell you... the definition of insanity?"''
* ContinuityNod: The first mission with Hurk in the "Monkey see, Monkey BOOM" DLC stories involves stealing a stash of Bowa-Seko conflict diamonds from the pirates. True to form, they're represented by a single massive rock sitting in an empty briefcase, just like ''VideoGame/FarCry2''.
** A woman in Bad Town also claims to have been "sold out" by the Jackal. On the other hand, [[MultipleChoicePast this is one of several contradictory stories]] she tells about her past...
** A quest given by a man who believes he is being tormented by aliens asks you to find "their" packages for him. To track them down, he gives you the very same map-and-diamond-tracker device from ''VideoGame/FarCry2'', albeit with the screen smashed so only the tracker works.
** The use of plants as potent drugs to enhance human ability harkens back to ''Instincts'', where Krieger's special "mutant" serum was made from similar herbs he found on the islands. Most of Carver's abilities in ''Instincts'', including tracking targets by scent and greatly enhanced speed and jumping ability, can be replicated with the drugs you make from the plants on the island.
** One side quest involves Seto, a secondary character from the game's Co-op story which takes place 6 months before the game proper.
* TheOtherMarty: Jason was originally going to be voiced by Elias Toufexis, who ended up doing ''two years'' worth of voice work for the game. After the successful release of ''VideoGame/DeusExHumanRevolution'', where Toufexis voiced protagonist Adam Jensen, Ubisoft replaced Toufexis with Gianpaolo Venuta since, in the words of the former, "they didn't want people playing this game and thinking of another game".
* InkSuitActor: Vaas is modeled after his voice actor Creator/MichaelMando. Mostly because the developers were so impressed by Mando's audition that they created the character of Vaas, and stuck him in all of the advertisements.
** Early reports had only Jason and his girlfriend on the island, and in something of a variation of the first ''VideoGame/FarCry'', Jason was a journalist.
** Vaas was added very late in production, with large chunks of the script rewritten to focus on him instead of the rest of the villains. According to the developers, his voice actor Creator/MichaelMando had originally auditioned for a generic pirate NPC, but his performance impressed them so much that the character of Vaas was written specifically for him.
** Another member of Jason's group, Vincent Salas, appears in the flashbacks and club sequences but not on the island. According to lead writer Jeffrey Yohalem, he was originally involved in several key scenes on the island and even showed up during Jason's fight with Vaas, but they had difficulty integrating him into the fight and opted to cut him from the island entirely.
** Modders in the PC version found code references suggesting that the weapon jamming mechanics of ''VideoGame/FarCry2'' were meant to return, albeit simplified and sans the BreakableWeapons shenanigans that were present in that game.