I’d say :

• The first Deus Ex and its first prequel Human Revolution
• Mafia I
• Max Payne 1 and 3
• Crash Bandicoot 1
• Age of Empires II
• GTA III
• Doom 1/2
• First Half-Life
• First Unreal
• Doom 3
• Duke Nukem 3D
• Morrowind
• Skyrim (modded and fixed, vanilla is pure garbage)
• Blood Omen 1
• Silent Hill 1 and 2
• Resident Evil 1 and 4 (and their remakes)