He also earned a very specific fame for his "You're not supposed to be here" Easter egg in Duke Nukem 3D, which was only accessible via cheating.

Oh! I remember that one!

Well fuck. What a guy. Timeless level design - a name that has gone down in history for all the right reasons.

It's weird and sad to see prominent figures of my formative youth passing. Time moves ever onward.

It doesn't say how old he was, but there was this about him starting in the industry later in life:

...he said he was 35 when he made his first Doom level, calling himself "a late bloomer with games," while Apogee founder Scott Miller said Gray was "in his 40s" when the studio hired him out of the Doom mod scene to work on Duke Nukem 3D.

He was a legend. Rest in peace.

RIP Levelord. I’ll boot stomp in your honor

Levlord takes me back...

LEVELORD - INSANE crazey man whos a nut!!!! he eats drugs and children. hes nuts!!!!

SURVIVORE - TEH FPS GAME DISGNAR SHOWDOWN OR SOMETHING AWFUL

And here I just found out that Bobby Prince died a few months ago.

He had a terrific sense of humor, too. For example, in Duke 3D he made this hung jury room. A real legend.

What's the joke?