1. Order of Valve Half-Life Games
Here is a comprehensive list of all Half-Life games made by Valve from 1998-2020.
• Half-Life
• Half-Life: Opposing Force
• Half-Life: Blue Shift
• Half-Life 2
• Half-Life 2: Episode 1
• Half-Life 2: Episode 2
• Portal
• Portal 2
• Half-Life: Alyx
