A crossover that Ghost Recon Wildlands has, Operation Watchman is a Sam Fisher, Splinter Cell missions. You meet up with the one and only Sam Fisher, and get some cool Echelon cosmetics. Make sure Wildlands is updated so you have access to this mission, other crossovers and much more! Pirates, you just get the base buggy garbage game, not what the game has bloomed into.
Operation Watchman Mission
Parachute to Sam Fisher to make it easy
Enter by the Helopad for a fairly easy entry
Drive thru the front gates to make it most difficult!