Complete the indicated task or mission to unlock the corresponding costume.
Amanda: Extra Op 67 with an "S" rank.
AUSCAM: Main Op: Barricade Destruction.
Bad Smell: Extra Op 61 with an "S" rank.
Battle suit with helmet: Randomly appears when fighting "SS" rank matches in Outer Ops.
Battle suit: Main Op: first Peace Walker battle.
Bikini: On the bridge after you complete Extra Op 68 with an "S" rank.
Black, khaki, navy blue, white, red, yellow, pink, etc.: Bonus downloadable content.
Choco-chip: Extra Op 45 with an "S" rank.
Gear Rex: Extra Op 125 with an "S" rank.
J. Fatigue: Available by default.
Leaf: Extra Op 14 with an "S" rank.
Liolaeus (Rathalos): Extra Op 121 with an "S" rank.
Miller: Extra Op 68 with an "S" rank.
Naked (AUSCAM): Extra Op 30.
Naked (chocolate): Outer Op.
Naked (Leaf): Outer Op.
Naked (with black, khaki, navy blue, red, etc.): Bonus downloadable content.
Naked (Snake): Main Op: Tropical Cloud Fog Forest.
Naked (Splitter): Extra Op 29 or Outer Op.
Naked (Tiger Stripe): Main Op: Pursuing Amanda.
Naked: Available by default.
Neo Moss: Use CODEC to communicate with the ghosts until they say "The End" in Extra Op 62.
Snake: At the concrete area where the lumber is stacked in Extra Op 16.
Sneaking Suit: Main Op: Combat helicopter: Mi-24A.
Splitter: Extra Op 29 or on top of a box in Extra Op 59.
Square: Extra Op 30.
Swimming trunks: On the bridge after completing Extra Op 67 with an "S" rank.
Tiger Stripe: In Bananal Fruta De Oro sorting shed at the office in the north end in Main Op: Pursuing Amanda.
Tigrex: Extra Op 123 with an "S" rank.
T-shirt: Second floor in Extra Op 1.
Tuxedo: Chapter 4.