The characters for the first 3 games and which they were present in. "boss" and "enemy" mean you could only play against the character, not as them. Counts Ultimate Mortal Kombat 3 the same as plain Mortal Kombat 3:
- Sonya (1,2,3)
- classic Sub-Zero (1,2,3)
- Scorpion (1,2,3)
- Kano (1,2,3)
- Liu Kang (1,2,3)
- Johnny Cage (1,2)
- Raiden (1,2,3)
- Goro (boss-1)
- Shang Tsung (boss-1,2,3)
- Kung Lao (2,3)
- Reptile (2,3)
- Katana (2,3)
- Baraka (2,3)
- Jax (2,3)
- Shao Kahn (boss-2,boss-3)
- Night wolf (3)
- Jade (enemy-2, 3)
- Mileena (3)
- Sektor (3)
- Cyrax (3)
- Ermac (3)
- Sindel (3)
- Stryker (3)
- Kabal (3)
- Sheeva (3)
- Smoke (3)
- human Smoke (enemy-2, 3)
- American Sub-Zero (3)
- Noob Saibot (enemy-2,3)