[general update february 25 2016]
[update november 12 2016]
[update december 22 2016]
[update december 31 2016]
[update february 5 2017]
[update march 2 2017]
[update march 11 2017]
[update september 27 2017]
The first time I tried this challenge it was 20 years ago with Doom 1 and 2, so it's very simple : You can use only the shotgun in nightmare.
Playing only with the shotgun, changes the game because it's necessary to develop an appropriate strategy for each map. It's stressful for me to play like this especialy when I play to get a Perfect, but I like this adrenaline

Now, I have done all maps, but may be some players can succes with a better performance.
I hope to see yours frags

Years ago, I tried to do

All maps, with my results and my feeling :
Q3DM0: Introduction | easy to get a Perfect
Q3DM1: Arena Gate (Ranger) | normal to get a Perfect
Q3DM2: House of Pain (Phobos) | hard to get a Perfect
[youtube]x3Osea60UM8[/youtube]
Q3DM3: Arena of Death | hard to get a Perfect
Q3TOURNEY1: Power Station 0218 (Sarge) | easy to get a Perfect
[youtube]rpmz7AbQgQo[/youtube]
Q3DM4: The Place of Many Deaths | hard to get a Perfect
Q3DM5: The Forgotten Place | hard to get a Perfect
Q3DM6: The Camping Grounds | normal
Q3TOURNEY2: The Proving Grounds (Hunter) | hard, one of two hardest
Q3DM7: Temple of Retribution | hard
Q3DM8: Brimstone Abbey | hard to get a Perfect
Q3DM9: Hero's Keep | normal
Q3TOURNEY3: Hell's Gate (Klesk) | easy (no shotgun available added via "Devmap" and "Give Shotgun")
Q3DM10: The Nameless Place | easy (no shotgun available added via "Devmap" and "Give Shotgun")
Q3DM11: Deva Station | normal to get a Perfect
Q3DM12: The Dredwerkz | normal
Q3TOURNEY4: Vertical Vengeance (Anarki) | easy to get a Perfect
[youtube]de1D7pVGO-4[/youtube]
Q3DM13: Lost World | easy to get a Perfect
[youtube]D7SOMapwVLA[/youtube]
Q3DM14: Grim Dungeons | hard to get a Perfect
Q3DM15: Demon Keep | hard to get a Perfect
Q3TOURNEY5: Fatal Instinct (Uriel) | hard to get a Perfect
[youtube]ku7oEuVo3KQ[/youtube]
Q3DM16: Bouncy Map | normal
Q3DM17: The Longest Yard | hard, one of the two hardest because you need to be lucky
Q3DM18: Space Chamber | hard
Q3DM19: Apocalypse Void | easy
[youtube]f66_jHsWSoQ[/youtube]
Q3TOURNEY6: The Very End of You (Xaero) | easy to get a Perfect (no shotgun available added via "Devmap" and "Give Shotgun")
I put my links video but I think it's better at start to no watch them if you want to do this challenge and develop your own strategy for each map.
