- Final Fantasy VI to Final Fantasy VII
- Grand Theft Auto 2 to Grand Theft Auto III
- Dead or Alive to Dead or Alive 2
- Links Awakening to Zelda: A Link to the Past
- Super Metroid to Metroid Prime
- Fallout 2 to Fallout 3
- Ninja Gaiden 2 to Ninja Gaiden (Xbox)
But if I had to choose ONE game as the best and clearest example for said topic: it would be...
Silent Hill 4 to P.T.
Konami's demo to their now cancelled game was a f***ing masterpiece.