As far as I know, both of the labels that released Grimlock material are no longer functioning, so I'm going to present what I think is a complete Grimlock discography.
I don't really have any info about Grimlock's demo, but I acquired this recording from someone of the the message board on the SA Mob website. It has 3 songs, and is encoded at 320kb.
Grimlock - Demo 1995
Next came the Thirst For Immortality 7" in 1995 on Pin Drop Records. The 7" contains these 3 tracks:
Feed My Rage Mountain of Power Bring The Pain
I decided to not rip the 7", because all 3 songs are contained in the hidden track on the Songs of Self cd.
1997 brought the Songs of Self cd on Pin Drop Records as well. This is where Grimlock really started to come into their own. It includes such tracks as 24, about the hockey player Bobby Probert, and My Sins, which contains some of the most volatile lyrics I can really recall hearing, i.e. "break the bottle over your face. lay there and bleed bitch." and "I'll kill you...I'll kill you...you fucking cunt."
On a sidenote, let's take a look at the picture on the inside of the cd insert:
Who is that guy near the bottom left of the picture, and why on Earth did they turn him into a cyclops?I've always figured that their must be a backstory containing some major b33f.
Grimlock - Songs of Self Pin Drop Records 
Crusades of Reality was Grimlock's first release on Life Sentence Records (based out of Salt Lake at the time). The monologue throught the song The Pain Game is of particular awesomeness. This EP contains 6 more songs of exceptionally heavy hardcore, although I always thought the production value wasn't as great as the previous record.
Grimlock - Crusades of Reality Life Sentence Records 
Shortly after the release of Crusades of Reality, a split 7" with Rebirth came out on the SIH label from Japan. The only Grimlock track on the 7" though is Lamentation, which can already be found on Crusades of Reality. In 1999, after touring on behalf of the EP for Life Sentence, Grimlock broke up.
In 2003, Grimlock got back together, and recorded another EP for Life Sentence Records. Once again, they recorded 6 tracks, but the production on this record is great. This EP sounds heavy as can be, and John's vocals really got stepped up.
Grimlock - Crusher
Life Sentence Records 
The Crusher cd was also an enhanced cd, which contained pictures, desktop wallpapers and a couple of quicktime videos. I extracted those files, and uploaded them here:
In 2005, Grimlock disbanded once again. I was really hoping they'd make their way to the Northwest one more time, but my dreams were squashed by their breakup. Life Sentence Records also seemed to disappear again around 2005/2006. The label's owner, Dan Gump, seemed to drop off the face of the Earth yet again (the same thing happened around 2000 when he then surfaced in, I think, Milwaukee). Numerous rumors have circled around Dan for many years, but I've heard that he actually sold out this time, which is too bad, because Excessive Force ruled! He was also a pretty nice guy the few times I met him while touring through SLC.