Electronic ruins

Computer games I would revisit given sufficient time:

Alpha Centauri/Alien Crossfire
Final Fantasy VII and VIII (neither of which I've actually finished, though I was close in FF7)
Omega (roguelike)
Parasite Eve
Persona (PSP port, not the earlier bastardized PS1 port)
various Infocom adventures
Wasteland

Computer games worth remembering:

Portal
This War of Mine

There are others that I would enjoy, but the above would make an acceptable showcase.