Valve!

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