The first person shooter-style game has won several awards over the years and has even been called the best game of all time.
Valve’s Steam includes a long list of popular games such as Left 4 Dead 2, Counter Strike, Mac Payne and Half Life. The service hosts over 1,100 games and includes more than 25 million players around the world.
The company plans to roll out new games for the Mac on Wednesdays, and will offer feature parity with the Windows version of the platform.
Half Life 2 for the Mac is priced at US$19.99 and is available at Valve’s online Steam store.