The first FPS by Bungie.
Features RPG and Adventure elements. Go back and forth between levels, increase your stats, find and use items, solve puzzles, and of course, kill many, MANY monsters.
pathways-i-d-11.sit (1.89 MiB / 1.98 MB)
System 6.x - Mac OS 9 / compressed w/ Stuffit
pathwaysintodarkness.zip (26.79 MiB / 28.09 MB)
System 6.x - Mac OS 9 / Zipped
Emulating this? It should run fine under: Basilisk II