Brutal Doom: Doom 2 Reloaded - Map 32 - The Super Secret Level

Your efforts will be rewarded if you can complete this map with 100% secrets. Everyone fails the first time. If you never know failure, how can you know success?

Map: Doom 2 Reloaded - 32 - The Super Secret Level
Source Port: Zandronum 3.1 with Brutal Doom v21
Difficulty: Ultra Violence

Where do I get these maps? Link provided below: https://www.doomworld.com/idgames/levels/doom2/megawads/d2reload