5. Second Sight
From the people who brought you the excellent Timesplitters series, comes Second Sight, a game which on the surface seems to be a throwaway third-person action title, but actually proves to be a hideously under-rated stealth action experience. In an interesting twist, the physic powers available to the player throughout are encouraged for defensive use - the main aim is to slip through unnoticed, without raising alarm, although obviously there are sections where John Vattic, the main character, can turn the tables of his better-armed enemies. Not quite as well-remembered as any of the Timesplitters games, Second Sight is worth your attention now. Bust out that old PS2 and play it, because it's well worth the effort.