“HAPPY 21ST BIRTHDAY, DOOM!” John Romero tweeted yesterday. “In honor of this legal drinking age birthday, I’m about to release some never-before-seen DOOM game art!”

I know what you’re thinking – “21 years old! The US drinking age is barbaric.” Then you pause and realise “Wait, never-before-seen Doom art? Ooh!” And yes, it is splendid. Since then, the id co-founder has shared treasures including scans of the clay models id turned into monster sprites, and all sorts of abilities, textures, and gore that never made it into Doom. It’s a joyous Doomdump.

Now, I might simply point you to Romero’s timeline, but Twitter’s ephemeral nature means all these things will soon scroll down out of sight. So let’s embed them and have a nice big colourful post. You can download high-res versions of many from his Dropbox too. I think I might’ve seen a few of these before, or maybe similar pieces, but it’s still a tweet-o-treat-a-rama. Tweets, go!

Let’s start out with the scans. Lots of Doom’s sprites were based on scanned objects, some items they found and some clay models sculpted by Adrian Carmack (no relation to John).

Freshly cleaned-up background of the DOOMGUY clay model, 1993. pic.twitter.com/hsqHLR7CNo — John Romero (@romero) December 11, 2014

Did you know the Pinky demon was drawn over a video scan of a dinosaur toy?? IT IS TRUE. pic.twitter.com/cBlTLZSthZ — John Romero (@romero) December 11, 2014

Pre-pixel edit scan of the Baron of Hell, 1993. pic.twitter.com/b62TmncdK6 — John Romero (@romero) December 11, 2014

Pre-pixel edit scan of the Cyberdemon, 1993. pic.twitter.com/yiMNODH3Ba — John Romero (@romero) December 11, 2014

Gregor Punchatz was behind other models, including Doom II’s new enemies.

The Revenant from DOOM II, direct from video scan, 1994. pic.twitter.com/CdwMUasAl9 — John Romero (@romero) December 11, 2014

Archvile model scan, circa 1994. pic.twitter.com/uwExWsstCb — John Romero (@romero) December 10, 2014

Well, most of Doom II’s new enemies.

The Icon of Sin, original scan of my head from a Businessweek photo shoot in 1994. Not the exact pic, but from then. pic.twitter.com/fEbkYObyw9 — John Romero (@romero) December 11, 2014

Several weapons were based on scans.

Here's the video scan of the DOOM pistol before editing. pic.twitter.com/LXJ3jchyxu — John Romero (@romero) December 11, 2014

Toy scan for chaingun, 1993. pic.twitter.com/0p75pzUGjX — John Romero (@romero) December 10, 2014

Some objects were scanned to use in level textures too.

Circuit board scans for wall textures, 1993. pic.twitter.com/6xn4dqVOli — John Romero (@romero) December 10, 2014

And some artwork started out as sketches on paper.

Some of Adrian's sketchbook scans about to be turned into wall textures, 1993. pic.twitter.com/Tn8Hfgi4qR — John Romero (@romero) December 11, 2014

Almost finished cleaning up Adrian's sketchbook scan and about to make a new wall texture, 1993. pic.twitter.com/c9nTQWCd1k — John Romero (@romero) December 11, 2014

Here are Adrian's scans from his sketchbook for various screens, pre-pixel edit. pic.twitter.com/MU0mp0O3gR — John Romero (@romero) December 11, 2014

Now onto unused stuff, much of which the Doom community is already busy converting to finally bring to Doom. Getting new id stuff for Doom after all these years is pretty weird and cool.

Pile of meat, never used. Maybe it was too gross in 1993. pic.twitter.com/xLrAjOSCKB — John Romero (@romero) December 11, 2014

We did make some bushes, but never used 'em. pic.twitter.com/KwQzM1hl0B — John Romero (@romero) December 11, 2014

We bullet casing art, but never implemented it. pic.twitter.com/LZsIuAX3gm — John Romero (@romero) December 11, 2014

Not sure what kind of death Pinky was experiencing – something from Scanners? pic.twitter.com/bW7gAVJlVa — John Romero (@romero) December 11, 2014

Yes, we created even more extreme deaths for DOOMGUY. How about decapitation? Torso removal? pic.twitter.com/hs60pO5XLV — John Romero (@romero) December 11, 2014

For the DOOM community, some original wall textures possibly not used. pic.twitter.com/TLCXYaD2gB — John Romero (@romero) December 11, 2014

More DOOM wall textures for the amazing DOOM community. pic.twitter.com/pWGqPkMpgy — John Romero (@romero) December 11, 2014

How about some wall textures we didn't use? DOOM Community wins again! pic.twitter.com/83CWVhrQOY — John Romero (@romero) December 11, 2014

Yes, we did create a bottom for the door, but we couldn't make the bottom translucent. pic.twitter.com/Suf5ctUZol — John Romero (@romero) December 11, 2014

More DOOM wall textures for the community. From 1993. pic.twitter.com/hJXVGcDxds — John Romero (@romero) December 11, 2014

Tom Hall wanted some signs for walls, so some walls had signs on them, just not these. pic.twitter.com/bih45wM9eE — John Romero (@romero) December 11, 2014

A vertical spine wall. Sliced up, too. 1993. pic.twitter.com/0Eno7SJ5aR — John Romero (@romero) December 11, 2014

He’s shared early and test versions of things too.

BFG version 0.9, circa 1993. It shot out tons of multi-colored plasma balls and slowed down the computer. pic.twitter.com/mUlmukAkwL — John Romero (@romero) December 11, 2014

A couple of original DOOM title logo tests. Plus, a possible background for the title. pic.twitter.com/yEbQesA4IV — John Romero (@romero) December 11, 2014

The original Lost Soul character before further revision, circa 1993. pic.twitter.com/i4s4JN4SvB — John Romero (@romero) December 11, 2014

Experimenting with various Pinky demon mouth-opening sizes, 1993. pic.twitter.com/soTdtvgvyo — John Romero (@romero) December 11, 2014

Can you believe this? The Spiderdemon original had a MAGIC ATTACK along with the gatling gun. Too strange. pic.twitter.com/k6YQQOMcri — John Romero (@romero) December 11, 2014

Guess what the original in-game DOOM font was like? pic.twitter.com/NdoY3kHgbv — John Romero (@romero) December 11, 2014

This original DOOM II box cover was painted by Julie Bell. The Cyberdemon didn't look right so we switched to BROM. pic.twitter.com/u3RjhXZh1O — John Romero (@romero) December 11, 2014

If you look closely, you can see some of Julie's background city in DOOM II's skybox. pic.twitter.com/j4PRrSGkS0 — John Romero (@romero) December 11, 2014

And back to those fine models.

Here's a photo of the DOOMGUY clay model when Adrian was done making it. The Baron of Hell lurks in the background. pic.twitter.com/Wy4XxHRO4J — John Romero (@romero) December 11, 2014

Here is a photo of the Cyberdemon when Adrian finished it (1993). pic.twitter.com/qNhnSDrYAq — John Romero (@romero) December 11, 2014

Here are the Spiderdemon Mastermind and Mancubus near the scanning table. pic.twitter.com/vQNxidqpa7 — John Romero (@romero) December 11, 2014

Here are photos of the DOOMGUY and Baron of Hell taken just last year. Yes, they still exist in great shape. pic.twitter.com/ul4MyiQh4J — John Romero (@romero) December 11, 2014

Bless ’em.