Moria and the original Rogue. The Infocom games, particularly Zork I and A Mind Forever Voyaging. Then, King's Quest I. The first 256-color adventure game that really blew me away was King's Quest V, floppy disk version. If we could only have all of that wonderful art in 4k resolution verses the old 320x200 pixelated DOS screens. I wonder what ever happened to the original paintings which were used for the game.
Alley Cat and Burgertime for arcade games. Later, the usual suspects: Wolfenstein 3d, Doom, Quake, etc.
The original Need for Speed for DOS with SVGA graphics (640x480) is the first PC driving game that truly blew me away. Screamer was a close second, and it came out the same year. Seems like just yesterday, but those games are now 31 years old. They still hold up very, very well. I'd rather play them today than all of the rubbish, bloated so-called A-level games of 2026 which have budgets in the hundreds (!) of millions of dollars, which is obscene.