In Marvel's Guardians of the Galaxy, there is no in-game store that enables you to purchase cosmetics. They are instead all unlocked through the course of playing the game by discovering their location. This All Costume Locations Guide will help you find them.
Most of the costumes in Marvel's Guardians of the Galaxy are fairly easy to come across by just playing through the chapters in the game, there are others that are awarded to you when you hit certain points. The costumes that you find during the course of the game will show up on Star-Lord's visor as a yellow outlined object. Take a look at the video below to see the locations of all the costumes in each of the chapters.
00:00 - 00:38 - Intro
Rocket Raccoon MCU Costume
Chapter 1: 00:39 - 01:23
Groot MCU Costume
Chapter 1: 01:24 - 02:01
Star-Lord Nova-Lord Nova Corps Costume
Chapter 2: 02:02 - 02:45
Gamora MCU Costume
Chapter 3: 02:46 - 05:37
Groot Five Horseman of the Apocalypse Costume
Chapter 4: 05:38 - 08:14
Drax MCU Costume
Chapter 4: 08:15 - 08:51
Rocket Raccoon Five Horseman of the Apocalypse Costume
Chapter 4: 08:52 - 09:38
Drax Nova Corps Costume
Chapter 5: 09:39 - 11:24
Groot Nova Corps Costume
Chapter 5: 11:25 - 12:01
Star-Lord MCU Costume
Chapter 6: 12:02 - 12:39
Rocket Raccoon Nova Corps Costume
Chapter 7: 12:40 - 14:11
Gamora Nova Corps Costume
Chapter 7: 14:12 - 15:22
Bad-Lord Star-Lord Costume
Chapter 8: 15:23 - 16:50
Drax Cage Match Costume
Chapter 8: 16:51 - 17:53
Gamora Five Horseman of the Apocalypse Costume
Chapter 10: 17:54 - 18:43
Rocket Raccoon Hero of Halfworld Costume
Chapter 10: 18:44 - 20:48
Groot Annihilation: Conquest Costume
Chapter 10: 20:49 - 22:32
Drax Thanos Imperative Costume
Chapter 12: 22:33 - 23:22
Rocket Raccoon The Smuggler Costume
Chapter 12: 23:23 - 24:10
Groot Impaler Costume
Chapter 12: 24:11 - 26:07
Gamora Casual Kill Costume
Chapter 12: 26:08 - 27:14
Star-Lord Apocalypse-Lord Costume
Chapter 12: 27:15 - 28:34
Gamora Black Vortex Costume
Chapter 13: 28:35 - 29:26
Groot Five O'Clock Sprouts Costume
Chapter 13: 29:27 - 30:37
Rocket Raccoon The Stringer Costume
Chapter 13: 30:38 - 31:50
Katathian Monk Costume
Chapter 13: 31:51 - 32:35
Gold Team Costumes Unlocked For All
Chapter 14: 32:36 - 32:57
Star-Lord Team-Lord Costume
Chapter 14: 32:58 - 34:21
Drax Five Horseman of the Apocalypse Costume
Chapter 14: 34:22 - 35:48
Gamora Chosen Daughter Costume
Chapter 14: 35:49 - 37:28
Pre-order/New Game Skins Space-Lord, City-Lord, Sleek-Lord, Sun-Lord
37:29 - 39:29
Fashion Passion Achievement
39:30 - 39:47 (Find and equip all costumes)
Players who pre-ordered the game received early access to the Throwback Guardians Outfit Pack, which contained one costume for each of the crew. Players who purchase the game after its release can earn these costumes by playing the game and finding the boxes in their respective hiding places (the 2014 MCU costumes are in the list above). If you pre-ordered the game the costumes will not appear as you already have them.
You will be awarded the 'Golden Guardians' set of costumes upon beginning chapter 14 of the game. There are no boxes to locate.
Take a look at our Character Abilities Guide to get help selecting the right crew member for the correct situation during combat.