PLATFORM ADVENTURE
The Divide: Enemies Within (PS1/PC, 1996)
Partially non-linear gameplay (you'll unlock the sub areas in a set order though)
3D area and world maps (need to find it early on; pan and rotate, zoom, detailed topography, shows doors and items but doesn't show which doors lead to save rooms)
A few teleporters (one per area except for the forest canyon floor/second one, need to have found more than one transporter room to be able to teleport)
Only two ability upgrades that let you reach new areas besides regaining the jump early on (mines, double jump)
Strafing (no circle strafing though)
Frequent save points
One alternate ending
Start off damaged and without basic abilities after the intro level and cutscene
The world feels a bit more like a large maze platformer level than a real place compared to SM or Flashback for example
No truly hidden items? (they're all shown on the map if you reach the room they're in so the challenge comes more from navigating the 3D spaces, only in a few cases do you need to blow up a wall to get to a room with an item)
Influenced by: Metroid series, possibly Alpha Waves/Continuum, Simulcra, Jumping Flash, Hunter, Vortex
Influenced: Possibly Metroid Prime, Mega Man Legends, Mystical Ninja, SW: Dark Forces II