Completed in 2019:

Tom Clancy's Rainbow Six 3: Raven Shield
Half-Life
Deus Ex
Half-Life 2
Call of Duty: Black Ops 2
Dark Messiah of Might and Magic
Arma 3: Apex Protocol
Arma 3: Laws of War
Half-Life 2: Episode One
Operation Flashpoint: Resistance
Half-Life: Opposing Force
Half-Life: Blue Shift
System Shock 2
Half-Life 2: Episode Two
Cold War (2005)
Thief: Gold
Half-Life: Uplink
XIII
Soldier of Fortune
Desperados: Wanted Dead or Alive
Fallout
Fallout 2*
Black Mesa
Need for Speed: ProStreet
Grand Theft Auto IV: The Lost and Damned
Need for Speed: Most Wanted (2005)
Sleeping Dogs
Need for Speed: Underground 2*
Splinter Cell: Chaos Theory
Max Payne
Max Payne 2: The Fall of Max Payne (with Payne Effects 3)
Bioshock
Call of Duty: Modern Warfare Remastered
Elex
Valkyrie Profile 2: Silmeria*
Portal
Deus Ex: Mankind Divided + DLC
Dying Light

* = For one reason or another, technically not completed but I chalked it up as so regardless.