Mortal Kombat X (aka Mortal Kombat 10) has a nice list of hidden alternate costumes that you can unlock in all console versions of the game.
Some of these unlockable costumes can be found in the Krypt, but the majority of them are unlocked by doing specific things with certain characters in various different modes of the game.
Some characters have a few more costumes than others naturally (hello Kitana!), but that’s ok.
Let’s get started shall we?
Cassie Cage (Endurance) – Coordinates: -1, 10 (Frozen Graves) Cost: 2,100
D’Vorah (Kytinn Queen) – Coordinates: -7, 12 (Chamber of Bones) Cost: 1,240
Ermac (Tournament) – Coordinates: -21, 9 (Cemetery Grounds) Cost: Unknown?
Erron Black (Outcast) – Coordinates: -2, 9 (Frozen Graves) Cost: 1,220
Ferra/Torr (Master And Servant) – Coordinates: 6, 8 (Shadow Spider Kave) Cost: 1,320 (Timed Chest)
Jacqui Briggs (Boot Camp) – Coordinates: -8, 8 (Garden of Despair) Cost: 1,900
Jax (Tournament) – Coordinates: -19, 8 (Cemetery Grounds) Cost: Unknown?
Johnny Cage (Tournament) – Coordinates: 1, 6 (Shao Kahn’s Tomb) Cost: 1,470
Kano (Tournament) – Coordinates: -15, 19 (Walkway of Souls) Cost: 2,300
Kenshi (Tournament) – Coordinates: 6, 17 (Dark Pass) Cost: 1,870
Kitana (Tournament) – Coordinates: 1, 6 (Frozen Graves) Cost: 980
Kotal Khan (Osh-Tekk Warrior) – Coordinates: -8, 8 (Grotto of Gore) Cost: 2,100
Kung Jin (Shadow) – Coordinates: -1, 4 (Gallery of Shadows) Cost: 1,490
Kung Lao (Tournament) – Coordinates: -3, 19 (Hollow Grounds) Cost: 2,600
Liu Kang (Tournament) – Coordinates: 1, 11 (Dark Pass) Cost: 940
Mileena (Tournament) – Coordinates: -23, 10 (Cemetery Grounds) Cost: 540 (Timed Chest)
Quan Chi (Tournament) – Coordinates: -1, 8 (Frozen Graves) Cost: 1,260
Scorpion (Tournament) – Coordinates: 5, 28 (Spider Gem Hold) Cost: 210 (Timed Chest)
Raiden (Dark Raiden) – Coordinates: -1, 14 (Dark Pass) Cost: 100
Raiden (Tournament) – Coordinates: -17, 19 (Walkway of Souls) Cost: 2,350
Reptile (Tournament) – Coordinates: 15, 16 (Kavern of Doom) Cost: 470 (Timed Chest)
Shinnok (Tournament) – Coordinates: 0, 17 (Friggid Burrows) Cost: 1,100
Sub Zero (Kuai Liang) – Coordinates: 3, 3 (Lost Mausoleum) Cost: 2,350
Takeda (Shirai Ryu) – Coordinates: -5, 10 (Garden of Despair) Cost: 1,300
Cassie Cage (Endurance) – Complete the Klassic Tower with Cassie
D’Vorah (Kytinn Queen) – Complete the Klassic Tower with D’Vorah
Ermac (Tournament) – Complete the Klassic Tower with Ermac
Erron Black (Outcast) – Complete the Klassic Tower with Erron Black
Goro (Kintaro) – Complete the Klassic Tower with Goro on the Hard difficulty with a Gold rank
Jacqui Briggs (Boot Camp) – Complete the Klassic Tower with Jacqui Briggs
Jax (Farmer) – Progress through the Mortal Kombat X mobile app
Jax (Revenant) – Select Two Player mode and Kustom Kombat, then play as Jax and select the Danger Modifier (1% HP), win 15 matches with this setting (30 rounds)
Jax (Tournament) – Complete the Klassic Tower with Jax.
Johnny Cage (Ninja Mime) – Progress through the Mortal Kombat X mobile app.
Johnny Cage (Tournament) – Complete the Normal Tower
Kano (Tournament) – Complete the Klassic Tower with Kano
Kitana (Dark Empress) – Have the Brotherhood of Shadows reach Level 35, or complete the Premium Tower with Goro
Kitana (Klassic) – Progress through the Mortal Kombat X mobile app
Kitana (Tournament) – Complete the Normal Tower
Kotal Kahn (Osh-Tekk Warrior) – Complete the Klassic Tower with Kotal Kahn on the Normal difficulty
Kung Jin (Shadow) – Complete the Klassic Tower
Kung Lao (Revenant) – Win 30 matches in King of the Hill
Kung Lao (Tournament) – Complete the Medium Tower with Kung Lao
Liu Kang (Dark Emperor) – Complete eight Tower Challenges with the same character
Liu Kang (Revenant) – Win 10 ranked matches in a row
Mileena (Kahnum) – Survive 20 rounds in the Endless Tower with Mileena
Mileena (Klassic) – Progress through the Mortal Kombat X mobile app
Mileena (Tournament) – Complete the Klassic Tower with Mileena
Raiden (Future) – Login to your WBPlay account
Reptile (Tournament) – Complete the Klassic Tower with Reptile
Scorpion (Hanzo Hasashi) – Complete Chapter 10 in Story mode
Shinnok (Wrathful) – Complete the Classic Tower with Shinnok
Sub Zero (Kuai Liang) – Complete the Klassic Tower with Sub-Zero
Sub Zero (Revenant) – Complete all ten Test Your Might stages
Takeda (Shirai Ryu) – Complete Klassic Tower with Takeda