Inspired by Tormuse's approach to AoSh/AoOC I decided to give it a try as well. I got this after about ~20 tries.
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DoomRL (0.9.9.7) roguelike post-mortem character dump
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Moog, level 10 Mancubus Warrant Officer Marine,
defeated the Mastermind at the City of Dis.
He survived 21719 turns and scored 287560 points.
He played for 26 minutes and 30 seconds.
He opposed the Nightmare!
He killed 249 out of 309 hellspawn. (80%)
He was an Angel of Shotgunnery!
He was also an Angel of Overconfidence!
-- Special levels --------------------------------------------
Levels generated : 4
Levels visited : 0
Levels completed : 0
-- Awards ----------------------------------------------------
UAC Star (bronze cluster)
Shottyman Silver Badge
Shottyman Gold Badge
Shottyman Platinum Badge
Shottyman Diamond Badge
Shottyman Angelic Badge
Daredevil Gold Badge
Daredevil Diamond Badge
-- Graveyard -------------------------------------------------
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-- Statistics ------------------------------------------------
Health 89/80 Experience 46952/10
ToHit Ranged +0 ToHit Melee +0 ToDmg Ranged +3 ToDmg Melee +3
-- Traits ----------------------------------------------------
Class : Marine
Ironman (Level 2)
Son of a bitch (Level 3)
Reloader (Level 2)
Badass (Level 1)
Shottyman (Level 1)
Army of the Dead (Level 1)
SoB->SoB->Rel->Rel->SM->SoB->Bad->MAD->Iro->Iro->
-- Equipment -------------------------------------------------
[a] [ Armor ] blue armor [4/4] (87%) (P)
[b] [ Weapon ] Jackhammer (8d3)x3 [3/9]
[c] [ Boots ] plasteel boots [2/2] (100%)
[d] [ Prepared ] nothing
-- Inventory -------------------------------------------------
[a] assault shotgun (7d3) [6/6]
[b] green armor [1/1] (100%)
[c] green armor [3/3] (100%) (P)
[d] Shielded Armor [2]
[e] shotgun shell (x21)
[f] shotgun shell (x50)
[g] shotgun shell (x50)
[h] shotgun shell (x50)
[i] small med-pack
[j] small med-pack
[k] large med-pack
[l] large med-pack
[m] large med-pack
[n] phase device
[o] homing phase device
[p] envirosuit pack
[q] Hell Staff
[r] shell box (x40)
-- Resistances -----------------------------------------------
Acid - internal 0% torso 0% feet 50%
Fire - internal 0% torso 0% feet 25%
Plasma - internal 0% torso 20% feet 0%
-- Kills -----------------------------------------------------
16 former humans
40 former sergeants
20 former captains
20 imps
10 demons
8 cacodemons
3 hell knights
55 barons of hell
17 arachnotrons
3 former commandos
21 revenants
10 mancubi
25 arch-viles
1 Spider Mastermind
-- History ---------------------------------------------------
On level 1 he found the Jackhammer!
On level 2 he found the Shielded Armor!
On level 3 he found the Hell Staff!
He sounded the alarm on level 4!
Then at last he found Dis!
On level 8 he finally defeated the Mastermind.
-- Messages --------------------------------------------------
You see : a Spider Mastermind (heavily wounded) | pool of blood | [ m ]ore
The Spider Mastermind flinched! The Spider Mastermind flinched!
Fire -- Choose target...
You see : a Spider Mastermind (severely wounded) | blood | [ m ]ore
The Spider Mastermind flinched! The Spider Mastermind flinched!
Fire -- Choose target...
You see : a Spider Mastermind (severely wounded) | pool of blood | [ m ]ore
The Spider Mastermind flinched! The Spider Mastermind flinched!
You are hit! Boom! You dodge! Boom! Boom! You are hit! You dodge! Boom!
Fire -- Choose target...
You see : a Spider Mastermind (mortally wounded) | pool of blood | [ m ]ore
The Spider Mastermind flinched! The Spider Mastermind flinched!
Fire -- Choose target...
You see : a Spider Mastermind (almost dead) | pool of blood | [ m ]ore
The Spider Mastermind flinched! The Spider Mastermind dies. Congratulations!
You defeated the Spider Mastermind! Press <Enter>...
-- General ---------------------------------------------------
139 brave souls have ventured into Phobos:
120 of those were killed.
2 of those were killed by something unknown.
8 didn't read the thermonuclear bomb manual.
And 4 couldn't handle the stress and committed a stupid suicide.
5 souls destroyed the Mastermind...
2 killed the bitch and survived.
3 showed that it can outsmart Hell itself.
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The moment I saw the Jackhammer and I wasn't surrounded by any enemies that floor was done, I just made sure to wipe the floor clear before moving on. The game wasn't finished though! On level 2 I got a shielded armor which has to be one of the best armors for mitigating damage on a crappy spawn: just hug the enemies and laugh at their melee damage. It's also indestructible so I can always fall back to it if things go south. On level 3 I got the hell staff and by then the game was basically telling me to win. Anytime I was ambushed if I couldn't go into melee range to abuse the 90% damage reduction on the shielded armor I could always hell staff out of the way.
Jackhammer + MAD was very, very satisfying to use on Arch Viles and Barons, they would melt in 2-3 hits while getting launched to the next room.
The level right before SM, I spawned surrounded by 4 Arch Viles with Barons and Mancubi. I had a homing phase device as a backup plan if everything else failed, but the game was basically telling me to get the Shottyman badges by putting an invulnerability globe next to me.
Ridiculous luck aside, I think AoSh is actually made easier by AoOC overall. Just enough levels to get a mastery, and you only need to get lucky for a few floors in some way or form to make sure you stay over 80% kills. Oh yeah, and EXACTLY 80% kills?! Maybe I should just go and win the lottery already x)