Not sure of the exact history but pretty sure Steam was launched as a beta in 2002, or maybe 2003. In September 2003 or so the database was wiped and Steam was

Not sure of the exact history but pretty sure Steam was launched as a beta in 2002, or maybe 2003. In September 2003 or so the database was wiped and Steam was launched, again with probably only Counter-Strike available. Counter-Strike Source was launched some time in 2004 and then Half-Life 2 came along in November 2004.