I Spent most of my evening putting this list together.
Minnesota:
Rock Angel - Kick'in in the Black (7")
State of mind - Mass Persection
Soilent Green - Nothing to Offer (7")
Somnus - the Deceiver (7" split)
Walhalla - War Over Nordland (7")
Paradox - Reel Life
The Regime - Knucklesandwich
The Regime - U.G.L.Y.
Malicious - From Cradle to grave
The King's machine - A State of Mind
Cain's Alibi - Cain's Alibi
Color Blind - No Room for Hatred
Corum - Riffhead (non-Torrent)
Gemini - Gemini
Gemini - Out for Blood
Gemini - The Spiritual Dimensions Of Music
Iron Fist - Lewd, Crude and Tattooed
Unholy - Garden Of Souls
Unholy - Ash Wednesday
Unholy - As Below So Above
21st Century Sin - 21st Century Sin
Avalanche - Scratching At the Surface
Chaos Lords - Devour
Cromlech - Reconsciousness
Juggernaut - Deliverance
Plunder & Pillage - Lights Out
Porcelain God - Overflow
Porcelain God - Opinion
Warhead - Intervening
Demos:
Deathsquad - 1997 Demo
Mondo Thrasho - 1992 Demo
The King's Machine - Sample Plate
Animosity - Beneath the 13th Stone
Animosity - Life and Times of the Humble Narrator
Asphyxia - Plain and Simple
Autumn Embrace - April Sun
Beowulf - Circus of the Ugly
Destitute - Demo
Horror - Demo 1993
Impiety - Damnation of the Holy
Impiety - Despondent Ecstacies
Medieval - Explode
Mortifest - Skeletal Remains
Mortifest - Dulling the Senses
Necromis - Demo #1
Necromis - Perish
Offender - ...While in the Basement
Offender - Informal Balance
Ossuary - Fallen to the Pits
The Game Hens - Demo 1991
The Game Hens - Something Fowl
Thump-n-Crunch - Objection Overruled
Thump-n-Crunch - Thump-N-Crunch
Vile - Vile
Vile - Demo #2
Von Fang - Power
Wretched Hive - Wretched Hive
Avatar - Sadistic Trump
Black Eden - C'mon Take A Bite
Cryogen - Unholy Communion
Cryogen - Perceptions of Suffering
Impact Wrench - Violence Sweet Violence
Impact Wrench - Attention Deficit Disorder
Impact Wrench - Impact Wrench
Inflict - Frozen Moment
Kronk - Demo
Kronk - Demo 1993
Mercy - Stop Runnin'
Sanctus - Done With Reliance
Vorpal Bunny - Reign of the Lepus
State Of Mind - State Of Mind
State Of Mind - Mainroom Wanna-be's
Disturbed - Don't Expect Any Miracles
Disturbed - Voice of Insanity
Iron Fist - Crucify Me
Iron Fist - Gun at my head
Avalanche - Angst
Cromlech - Eternal Seed
No Man's Land - Just the Beginning
No Man's Land - Demo 1993
Warhead - Demo
Any Impaler Demo
South Dakota / North Dakota:
Zion - Roll The Rock/Less Of Me (7")
Demos:
Zion - Rock for Eternity
Xyster - Religion Of Nuclearism
Crash Alley - Crash Alley
Rotten Gramma - Rotten Gramma
Iowa:
Pursuit - Pursuit
State of Shock - State of Shock
Ravendawn - Upon Bloody Moonrises
Nyctophobic / Caesarean Section / Winter of Discontent / Groinchurn - Four Ways to Misery
Axen Province - Purification
Dirtnapp - Enemies Closer
Mantapus - Discography
Rude Awakening - Bound for Glory
AngelKill - Beyond the Black
AngelKill - Artist of the Flesh
Drown - Sprawl
Demos:
Atomic Opera - The Judgement
Pursuit - Pursuit
Axen Province - Axen Province
Defyance - Voices Within
Mantapus - Demo 1996
Thin Ice - Thin Ice
Sludgeplow - Turned Earth
Sludgeplow - Everything
Ritual of Agony - Scary Noises
Modifidious - Drown
Wisconsin: Coming soon
Edit: Went through the demos and found a few that were uploaded already