Christian Albums/Songs that famous Secular musicians play on

The ones that instantly come to my mind are all the times Marty Friedman collabed with Tourniquet. WMARD, AB, Stereotaxic Atrocities

Peter Frampton plays guitar on some songs on Dogs of Peace’s album Heel (not metal, classic style rock)

A whole bunch of secular shredders played short licks on Shout's In Your Face song. Somewhere in my storage underneath my stairs I've got the liner notes that identifies each player with time stamps.

Angelic Warlord had written: "...Lanny Cordola (House Of Lords), Michael Angelo (Nitro), Mary Friedman (Cacophony), Randy Hansen (Jimmy Hendrix Tribute), Joey Price (Thunderball) and Alex Masi (Masi)..."

Sevenoneself wrote:A whole bunch of secular shredders played short licks on Shout's In Your Face song. Somewhere in my storage underneath my stairs I've got the liner notes that identifies each player with time stamps.

I've heard that! I forgot what it's called and tried to remember multiple times.

I know Wikipedia isn't always trustworthy, but it says Shouts first album had Marty Friedman, Michael Angelo Batio, and Lanny Cordola.

Adrian Belew produced a Kevin Max album.

The ex-drummer for Morbid Angel recorded the drums for our upcoming album.

Kobi Farhi (Orphaned Land) and Simon Bibby (My Silent Wake, Seventh Angel) sang on Adorned Graves' latest album.

Rob Lowe sang on Last Chapter - The Living Waters.

Wino sang on Place Of Skulls - With Vision.

Hellhammer played drums on Antestor - The Forsaken.

Tilo Wolff (Lacrimosa) sang on Holy Tide - Aquila

Jorn Lande sang on Martin Simson's Destroyer Of Death - Eternal Reign

Kerrick wrote:Kobi Farhi (Orphaned Land) and Simon Bibby (My Silent Wake, Seventh Angel) sang on Adorned Graves' latest album.

Rob Lowe sang on Last Chapter - The Living Waters.

Wino sang on Place Of Skulls - With Vision.

Hellhammer played drums on Antestor - The Forsaken.

Tilo Wolff (Lacrimosa) sang on Holy Tide - Aquila

Jorn Lande sang on Martin Simson's Destroyer Of Death - Eternal Reign

The vocalist for Praying Mantis also featured on AG’s album

Christian Thrash Rules wrote:The ones that instantly come to my mind are all the times Marty Friedman collabed with Tourniquet. WMARD, AB, Stereotaxic Atrocities

The first time Marty played on a Tourniquet song was in The Hand Trembler in The Collected Works of Tourniquet. I'm not 100% sure about Perfect Night for a Hanging but he might've played on that one too.

Another ex-Megadeth member Chris Poland also played in Onward to Freedom and Gazing at Medusa.

Karl Sanders from Nile played in some songs on Onward to Freedom and Antiseptic Bloodbath.

Pat Travers played in Antiseptic Bloodbath.

Vince Dennis (Vincent Price) from Body Count and Steel Prophet was a Tourniquet member for about a year. He was included in the booklet of Acoustic Archives but I think he didn't play in any song on that record. He however plays in the Live in California live video and album.

Demon Hunter has featured a lot of secular guest artists over the years. Mike Williams (The Agony Scene) on Beheaded, Howard Jones (ex-Killswitch Engage, Light The Torch) on Our Faces Fall Apart,
Brock Lindow (36 Crazyfists) on Beauty Through The Eyes Of A Predator,  Bjorn Strid (Soilwork, The Night Flight Orchestra) on Collapsing, Christian Alvestam (ex-Scar Symmetry, Miseration) on Just Breathe, Dave Peters (Throwdown) on Feel As Though You Could, Max Cavalera (ex-Sepultura, Soulfly, Cavalera Conspiracy) on Defense Mechanism, Tom S. Englund (Evergrey) on Silence The World , and Richie Faulkner (Judas Priest) on Godless. Not really a guest feature as such, but if you want to dig deep into their history, an aspiring artist named Joshua Tillman also laid down some drum tracks on their debut album while he was living in a space provided by their, producer Aaron Sprinkle. He would later achieve fame as an indie folk artist going by the name Father John Misty. 

Project 86 featured Johannes Persson from Cult Of Luna on Medusa, the closing song from the most recent double album.

Maybe most surprisingly to me since he’s not typically associated with hard rock or metal in his own career, is that David Crowder has done of couple of collaborations that would fit this criteria. Back when he still had the David Crowder* Band, Ted Nugent of all people guested on the song We Won’t Be Quiet. Later as a solo artist, he featured Bill Kelliher from Mastodon (as well as Oz Fox) on the track All You Burdens.

Johnny Cash on Man In Black by One Bad Pig.

Lecrae has a track with David Banner and Paul Wall.

Tobias Sammet sang on Rob Rock’s Holy Hell album (Abba cover).

And then there is Liberty N’ Justice.

Paul Gilbert played on Darrell Mansfield's, Revelation album.
Dio with Kerry Livgren.

Liberty ‘N Justice made a career of this. Too many to name. Justin is missed.

seth wrote:

Kerrick wrote:Kobi Farhi (Orphaned Land) and Simon Bibby (My Silent Wake, Seventh Angel) sang on Adorned Graves' latest album.

Rob Lowe sang on Last Chapter - The Living Waters.

Wino sang on Place Of Skulls - With Vision.

Hellhammer played drums on Antestor - The Forsaken.

Tilo Wolff (Lacrimosa) sang on Holy Tide - Aquila

Jorn Lande sang on Martin Simson's Destroyer Of Death - Eternal Reign

The vocalist for Praying Mantis also featured on AG’s album

Oh that's right!  I'm not familiar with that band so I forgot about that.  I'm somewhat surprised nobody's felt cute and mentioned Dale T. due to his unorthodox beliefs...

Rob Rock sang on two Avantasia albums.

How could I forget? Randy Blythe of Lamb Of God sang on P.O.D.’s song Drop.