Half-Life: The Opera

Global Total as of 03rd Jan 2015 (units): N/A
Platform: Microsoft Windows
Developer: Unknown	Genre: Shooter

Release History

Title	Publisher	Region	Date	Distribution
Half-Life: The Opera	Unknown	North America	01st January 2000	Retail

Half-Life (4.12m)
Doom II (3.61m)
Doom (2.85m)
Battlefield 3 (2.73m)
Half-Life 2 (2.37m)
Star Wars: Dark Forces (1.95m)
Call of Duty: Modern Warfare 3 (1.66m)
Call of Duty: Black Ops (1.57m)
Battlefield 4 (1.20m)
Call of Duty: Black Ops II (1.19m)
Call of Duty 4: Modern Warfare (1.13m)
Doom 3 (1.10m)
Far Cry 3 (0.91m)
Call of Duty: Modern Warfare 2 (0.85m)
Borderlands 2 (0.82m)
Portal 2 (0.73m)
Crysis 2 (0.72m)
Crysis (0.71m)
Battlefield: Bad Company 2 (0.71m)
Call of Duty: Ghosts (0.68m)