"" (set five years after "Metal Gear Solid 2") features Raiden after rescuing Olga's daughter Sunny from the Patriots, and searching the corpse of the mercenary Big Boss for Big Mama in exchange. The trauma of his breakup with Rosemary and the apparent miscarriage of his child have made Raiden believe he belongs on the battlefield. Raiden is fitted with a cybernetic exoskeleton as a result of the Patriots' machinations; he helps Solid Snake in the fight against Liquid Ocelot, wanting to obtain the Patriots' powers. However, he is wounded by Vamp in a fight. With his blood having been replaced with a military substitute called that requires regular maintenance, Raiden is treated by Sunny and Doctor Naomi Hunter. Following his recovery, Raiden goes back to Snake, killing Vamp and stays in Ocelot's ship "Outer Haven" to protect Snake as he shuts down the Patriots' AIs. In an epilogue, Rosemary tells Raiden their child was not miscarried; her marriage to Roy Campbell was a hoax to protect her and their son from the Patriots. Upon hearing this news, Raiden reconciles with Rosemary.