Works of art aren't necessarily big games. But I'll stick to the games that made a big impression on me, and made me spend a lot of time on them. 1) Wizardry VII: Crusaders of the Dark Savant: my formative CRPG experience. W7 is not just huge and devilishly complex, it is also memorable for Lost Guardia, a low-tech fantasy world under invasion by multiple interstellar factions looking for a magical artifact that could be used to create worlds. From giant moths to musket-wielding rhino-men and cheerleaders on red rocket sleds with lasers (bless 'em!), Wizardry has it. 2) Master of Magic: the best of the 4X games. Town-building, armies, heroes, spell research and fantastic creatures. 3) Unreal: in a game about killing things with rocket launchers, razor blades and bioslime, you find... beauty? That has always been the odd, compelling thing about Unreal. The original campaign has an amazing sense of mystery, melancholia and discovery. Unreal also had scale, and creative level design, which you can also see in the various UT maps. PlusnUnreal gave us Unreal Tournament, the multiplayer FPS game for those of us who did not have a network connection. 4) Blood: the weapons are creative and varied, there are huge levels full of interactive bits, destructible terrain, tons of secrets, and amazing features you could never expect in a modern FPS. I have not even delved into the levels made by the mod community yet. 5) Deus Ex: it is Deus Ex. Like Thief, when it came out, we thought it would be a stepping stone towards a new generation of immersive games. Instead, it became a sort of high water mark that has not been equalled, or even approached.