Doom Challenges Deemed Impossible

For over 20 years some map-specific challenges in all 4 commercial Doom games were deemed impossible. Are they actually impossible? Let's find out.

Compet-n:
https://www.doom.com.hr/index.php?pag...

DSDA:
https://doomedsda.us/index.html

The Ultimate Doom E2M8 UV Pacifist by 4shockblast:
   • Doom E2M8 Pacifist in 12:42  

The Ultimate Doom E4M6 UV Pacifist by Zero Master:
   • Ultimate Doom - E4M6 (Against Thee Wi...  

The Ultimate Doom E4M7 75% Secrets by 19duke84:
   • Видео  

Doom II MAP02 UV Pacifist by Zero Master:
   • Doom II: Hell on Earth - Underhalls (...  

Doom II MAP30 UV Pacifist by Zero Master:
   • Icon of Sin done Pacifist! [TAS]  

TNT: Evilution MAP02 NM100S by Ancalagon:
   • Final Doom TNT Evilution Map02 NM100s...  

TNT: Evilution MAP05 UV Pacifist by Ser:
   • [TAS] Final DOOM TNT: Evilution - MAP...  

TNT: Evilution MAP08 UV Pacifist by Zero Master:
   • Final Doom TNT Evilution Map 08 Pacif...  

TNT: Evilution MAP09 Nightmare! by stx-Vile:
   • TNT Evilution Map09 nightmare speedrun  

TNT: Evilution MAP09 NM100S by Ancalagon:
   • Final Doom TNT Evilution Map09 NM100s...  

The Plutonia Experiment MAP30 UV Pacifist:
   • Plutonia MAP30 UV Pacifist in 29 Seco...