Trying to compile a list of ALL Dev/DTB songs that did NOT appear on an LP, OR they did appear on an LP but as a hidden, extra, limited edition, or bonus track.

Am I missing ANY?

Amsterdam
Another Road
Ascent to the Summit of Black Mountain
Assignable
Black and White
Bury the Wrong
Cold
Don't Know Why
Echo
Ernies Room
Forgotten
Friends
Humble
I Am
L.A.
Locate
Love-Load
Man
Morwar
My Girl
Ocean Machines
Om
Oodles of Noodles
Processional
Promise
Rain
Red Tomorrow
Road Kill
San Pablo Train
Sit in the Mountain
Soft
SunMud/Woman
Synchronicity Freaks
Testing Fender Gear
That's Life
Thick Stock
Things Beyond Things
Travelling Salesman
Universal

Synchronicity Freaks
Oodles of Noodles (Ki Jam)
Testing Fender Gear

The ones you listed are all the ones I'm aware of.

If you want to go the next level, you can count songs he did on other people's albums:

Nerd Alert (from Guitars That Ate My Brain)
Natural Science (from some Rush tribute album)

Then there's the Human Equation songs, which he wrote part of... then there's a billion other guest appearances he's done...

Idom, which was on some odd japanese compilation, and was later reworked into Dire/Consequence for the SYL album.
Sinner, from a Judas Priest tribute album (I think Dev only did the vocals on this track. The same applies to the Rush cover mentioned).

There are live acoustic versions of Hide Nowhere and Sister on some versions of Infinity.

I wouldn't consider Things Beyond Things a bonus track, since it's on every pressing of the album, and such an integral part of OM

Dev did some vocal parts of James Murphy's album Convergence, on the tracks Since Forgotten and The Last One.

Looking at the Love Load (I Need Nobody But Me), from the Stillborn EP, by Unit:187, might be one to look out for.

Vocals on Wrathchild and Shout at the Devil alongside Stuck Mojo on their album Violate This.

I could go on but just realised there's a ton of this shit on wiki:

http://en.wikipedia.org/wiki/Devin_Townsend_discography

There's also a Korean bonus track on Accelerated Evolution.

Thanks all!

He did guest vocals for Ayreon's "Day Three: Pain"...nice collection

He did guest vocals for Ayreon's "Day Three: Pain"...nice collection

and Day Eight: School

[swervedriver]

and Day 16: Loser.

He also sang on Soilwork's "Black Star Deceiver."

He also sang on Soilwork's "Black Star Deceiver."

And "Song of the Damned"