Hexen: Beyond Heretic (PC, 1995)

Subgenre: FP Doom-like FPS/Action Adventure hybrid (three char classes, item inventory), 3 Player network co-op (added much later in the "Hamachi & Zandronum" mod version), 3D platformer/Jumping (and ​strafing)

Other: Five hub areas (areas connected to several other areas), Doing something in one level can have an effect in another level - not always communicated well though