I've looked up Gamespot for these games:

System Shock 2

Battlezone

Half Life

Perimeter

Darwinia

What do these games all have in common? Innovation. Nowdays most top-notch games must have explosive graphics and exciting battles. But for these "art" games, its a different story. They convey feelings and a distinct gameplay over over-the-roof experiences (which has now became a forced standard). It actually seems pretty sorrow that these games are forgotten and overrun by time. I wish that when I gets to run my little indepedent company (in the future, of course), which I dreamed about, then I'll light-heartedly ask and cooperate with my employees to make a budget, and nostalogia game like the ones above.