Descent

Descent is the first level in Prodeus to introduce the player to the Prodeans with the entire level revolving around a captive Harbinger. The level also introduces the Lunger Pro and is the first level to have non-secret Crawlers.

Secrets

 * 1) As soon as the level starts, look behind you and jump on the rocks. Reward: Automap
 * 2) On the first level, shoot a grenade into the vent to open an area later. Reward: 2 Large Rocket Ammo
 * 3) On the second level, a switch can be found low to the ground in a side room. Reward: Large Chaos Ammo
 * 4) On the third level, right behind the plug switch is an alcove that you can jump to. Reward: 2 Small Health