Half-Life was a very popular video game , and Half-Life 2 was also very popular . Through Steam , Half-Life 2 had three packages that a customer could order . The basic version ( `` Bronze '' ) includes only Half-Life 2 and Counter-Strike : Source , whereas the `` Silver '' and `` Gold '' ( collectorâ s edition ) versions also include Half-Life : Source ( ports of the original Half-Life and Day of Defeat mod to the new engine ) .