Half-Life

11 games in the franchise

• 
  Half-Life 1998 controls
• 
  Half-Life: Opposing Force 1999
• 
  Half-Life: Blue Shift 2001
• 
  Half-Life: Decay 2001
• 
  Half-Life 2 2004 controls
• HL2
  Half-Life 2: Deathmatch 2004
• HLS
  Half-Life: Source 2004
• 
  Half-Life 2: Lost Coast 2005
• 
  Half-Life 2: Episode One 2006
• 
  Half-Life 2: Episode Two 2007
• 
  Half-Life: Alyx 2020