(Video)Note that 20 minutes of the video is the Cyberdemon fight, and 15 minutes is the Spider Mastermind fight, so there's still lots of interesting gameplay if you want to skip those.
After having done attempts of Masochist Angelic Badge before, Demonic Diamond Badge is significantly easier. However, getting it on this particular run was quite a challenge and I had to play pretty well overall. I didn't have much for Invulnerability, but had some good luck with a Phase Device at the very end.
The most wild point of interest is I found a vault with two nukes on Phobos 2! I've never seen that before and it's rare to even find just one!
There were a few risky decisions I made that didn't pan out, but the only major mistakes were during the Cyberdemon fight where I made a bad step once and took a bit of explosion damage, and one point where I misclicked and took some heavy melee damage. I also used Combat Shotgun for a lot of the Spider Mastermind fight, forgetting to use Shotgun instead.
With this badge, I believe I am now tied for most Diamond Badges at 23/26!
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DoomRL (0.9.9.7) roguelike post-mortem character dump
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Icy, level 9 Cyberdemon Chaos Br. General Scout,
defeated the Mastermind at the City of Dis.
He survived 281851 turns and scored 334420 points.
He played for 1 hour, 29 minutes and 31 seconds.
He opposed the Nightmare!
He killed 481 out of 986 hellspawn. (48%)
-- Special levels --------------------------------------------
Levels generated : 11
Levels visited : 2
Levels completed : 0
-- Awards ----------------------------------------------------
Mastermind's Brain
UAC Star (silver cluster)
Untouchable Medal
Demonic Diamond Badge
-- Graveyard -------------------------------------------------
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-- Statistics ------------------------------------------------
Health 50/50 Experience 39778/9
ToHit Ranged +0 ToHit Melee +0 ToDmg Ranged +1 ToDmg Melee +1
-- Traits ----------------------------------------------------
Class : Scout
Finesse (Level 1)
Hellrunner (Level 2)
Tough as nails (Level 2)
Son of a bitch (Level 1)
Dodgemaster (Level 1)
Intuition (Level 2)
Int->Int->HR->HR->DM->TaN->TaN->SoB->Fin->
-- Equipment -------------------------------------------------
[a] [ Armor ] red armor [4/4] (100%)
[b] [ Weapon ] shotgun (8d3) [0/1]
[c] [ Boots ] nothing
[d] [ Prepared ] rocket launcher (6d6) [1/1]
-- Inventory -------------------------------------------------
[a] combat shotgun (7d3) [5/5]
[b] combat shotgun (7d3) [4/5]
[c] plasma rifle (1d7)x6 [0/40]
[d] red armor [2/4] (46%)
[e] chainsaw (4d6)
[f] shotgun shell (x50)
[g] shotgun shell (x50)
[h] shotgun shell (x50)
[i] shotgun shell (x3)
[j] shotgun shell (x50)
[k] shotgun shell (x50)
[l] rocket (x7)
[m] small med-pack
[n] small med-pack
[o] large med-pack
[p] hatred skull
-- Resistances -----------------------------------------------
Fire - internal 0% torso 25% feet 0%
-- Kills -----------------------------------------------------
93 former humans
99 former sergeants
21 former captains
87 imps
20 demons
87 lost souls
6 cacodemons
9 hell knights
7 barons of hell
3 arachnotrons
12 former commandos
5 pain elementals
3 revenants
7 mancubi
20 arch-viles
1 Cyberdemon
1 Spider Mastermind
-- History ---------------------------------------------------
He started his journey on the surface of Phobos.
On level 5 he stormed the Chained Court.
On level 8 he encountered the Phobos Anomaly.
He left level 9 as soon as possible.
He left level 11 as soon as possible.
He left level 12 as soon as possible.
He nuked level 14!
On level 16 he found the Tower of Babel!
He sounded the alarm on level 17!
He nuked level 18!
On level 19 he entered the Vaults.
He came, he saw, but he left.
He left level 20 as soon as possible.
On level 21 he stumbled into a complex full of arch-viles!
On level 22 he stumbled into a complex full of arch-viles!
He left level 22 as soon as possible.
He left level 23 as soon as possible.
Then at last he found Dis!
On level 24 he finally defeated the Mastermind.
-- Messages --------------------------------------------------
You load a shell into the combat shotgun.
Your combat shotgun is already loaded.
You wear/wield : a shotgun (8d3) [1/1]
You reload the shotgun.
You reload the shotgun.
You reload the shotgun.
You reload the shotgun.
You reload the shotgun.
You reload the shotgun.
You reload the shotgun.
You reload the shotgun.
You reload the shotgun.
You reload the shotgun.
You reload the shotgun.
You hear the scream of a freed soul! Congratulations! You defeated the Spider
Mastermind! Press <Enter>...
-- General ---------------------------------------------------
1927 brave souls have ventured into Phobos:
1463 of those were killed.
5 of those were killed by something unknown.
108 didn't read the thermonuclear bomb manual.
And 249 couldn't handle the stress and committed a stupid suicide.
102 souls destroyed the Mastermind...
10 sacrificed itself for the good of mankind.
87 killed the bitch and survived.
5 showed that it can outsmart Hell itself.
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