The Third Descent

The Third Descent is a vanilla-compatible megawad for Doom. 
It replaces the THIRD episode, containing 9 maps (E3M1-E3M9).

The WAD also contains:

 
Damned Two Deimos (E2M1-E2M9)

&

Return to Phobos (E1M1-E1M9)

All maps were made in Doom Format.
Pistol Starts and Continuous play tested.
Tested with: dsda-doom0.25.6. Zandronum 3.1, GZDoom 4.11, Chocolate Doom 3.1.1
Jumping and Crouching NOT recommended.
Freelook optional.