In Tom Clancy's Rainbow Six: Vegas, there is a Splinter Cell: Chaos Theory arcade machine in Dante's Casino that has Sam on it.
In Tom Clancy's Rainbow Six: Vegas 2, there is an Achievement/Trophy named "My Name is Sam" for which the player must get five headshot kills in a row while using a silenced weapon. The achievement photo shows the iconic trifocal goggles.
In Tom Clancy's Rainbow Six Siege, there is a Splinter Cell skin for the GIGN weapon P90 that features the Multi-Vision Goggles. This is acquired by playing Splinter Cell Blacklist and purchasing the skin on the Uplay store.
There is a purchasable version of the Multi-Vision Goggles and Sam's classic black combat suit on the Uplay store.
Sniper Ghost Warrior 2
There is an Achievement/Trophy named "Fisher King" given for killing 25 enemies using thermal or night vision goggles. The icon displays Sam Fisher's iconic trifocal goggles.
In the game "Vanquish", there is an achievement called "Fisher is the other Sam" which can be attained by proceeding on the monorail in Act 3-4 without being spotted by the enemy troops or searchlights.
Rayman Raving Rabbids 2
In Rayman Raving Rabbids 2, there is an outfit that represents the initial suit used by Sam fisher, complete with night vision goggles.
Parrarely, In splinter Cell Conviction, by the first coridoor in the White House, there is a Raving Rabbid figurine.
There is a mini-game called Spitter Sells where Rayman and the Raving Rabbids spit on unaware customer's drink.
Another Champion, Teemo, the swift scout, in his Omega Squad skin, he has an idle stealth animation that resembles Fisher's Promotional Art in Chaos theory, wearing goggles and holding his knife.
Far Cry: New Dawn
In Far Cry: New Dawn there are a few "War Journal" entries referencing about Sam finding his daughter Sarah which could possibly be hinting at a future Splinter Cell game to be released.
Sam Fisher's Suit can be unlocked for use by starting the Expedition called "Government Plane Wreck", locating the plane and interacting with the S.M.I within the Paladin plane, then going upstairs to the right to Charlie Cole's area and the suit will be hanging to the left.
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