Task Force Games' Valkenburg Castle and SPI's Deathmaze are both microgame dungeon-crawls.
However, they differ in that while Deathmaze has a completely random dungeon, created as you explore, Valkenburg Castle's dungeon never changes.
Each 1/2" square on the Valkenburg Castle map (above) represents a 10' x 10' section. The chits used in the game are similarly 1/2", and represent anywhere from 1 to 12 individuals. That's right, you could have 12 individuals in a 10x10 section.
Our modern sensibilities might rebel against such a notion, since most fantasy miniatures-games now assume a maximum of 4 miniatures in a notional 10x10 space. However, the old AD&D manuals assumed you could have 3 characters walking abreast down a 10' wide hallway, so perhaps the Valkenburg rules simply fitted with the times.