● ON ROBINHOOD CHAIN · OFF-CHAIN ATTITUDE
BAD CATS.
GOOD
HASHES.
Wolfenstein 3D Shareware. Stored on Robinhood Chain. Played in your browser.
Cattenstein adds a calico-cat twist to the original first episode. A separate cat skin meets the original game data in your browser.
No wallet needed. Just bring your reflexes.
0 PATIENCE.
Still prefer scratching.”— THE FOUNDER
01 / YES, THERE’S ACTUAL TECH
The cat is a meme.
The bytes are real.
This is a playable preservation experiment built on Wolfenstein 3D Shareware. The engine and first-episode data are stored as contract bytecode on Robinhood Chain. Your browser downloads those bytes from the node, verifies them, and runs the game locally. The registry below identifies the game archive.
“They shredded the game. For once, it wasn’t me.”
CAT EXPLAINS / 01THE ARCHITECTURE / TWO INPUTS. ONE ANGRY CAT.
Same original bytes.
A different kind of bite.
The original game data and the cat mod take separate paths. They meet only when the browser runs the game.
The archive stays put.
Wolfenstein 3D Shareware data, packed into contract bytecode.
The cat brings her own stuff.
New artwork and replacement text, kept outside the original game data.
- ├─ calico portraits
- ├─ paws & dog sprites
- ├─ bone wall textures
- └─ menu & episode labels
Original game + separate replacements
When the engine requests an asset, the mod-enabled runtime can select its cat-edition replacement. The archived game data stays unchanged.
original asset request → mod replacement, when availableThe loader verifies the archived payload before the separate skin is applied. The mod-enabled engine is supplied by the website; the archived engine remains part of the original on-chain payload.
“Original data” refers to the shareware game-data files, not an unchanged copy of the complete DOS distribution. The loader preserves the reconstructed WL1 files and loads replacement assets separately. This diagram describes the technical design, not a licensing permission.
DON’T TRUST THE CAT. CHECK THE BYTES.
You can verify
on-chain.
The proof is in the bytes. Read the registry, fetch the stored shards, and compare the reconstructed payload with its recorded Keccak-256 hash. You can run that check here without starting the game.
One registry. Every shard.
READING NETWORK…
The registry points to every shard, in order, and records the payload hash. Its address identifies the archive your browser checks.
Not checked in this session.
Two different kinds of verification.
Data verification: compare bytes and hashes. This does not require the explorer to have the contract’s source code.
Contract source verification: publish the source and build settings so an explorer can match them to the deployed bytecode and show readable code. That is not a security audit.
Read the registry source ↗What does a successful check prove?
It proves that the reconstructed payload matches the hash recorded by the selected registry, and that the loader’s seal and ownership checks passed. It does not prove who created the original game, establish licensing rights, or certify the contract’s security.
02 / MEET YOUR NEW OVERLORD
Calico.
Territorial.
Unplayable.*
*Her personality. The game is perfectly playable.
The dogs own the castle.
The cat disagrees.
Meet Cattenstein: a white, orange and black heroine; bones and canine portraits on the walls; a swift paw for anyone invading her personal space.
ORIGINAL GAME DATA. SEPARATE CAT SKIN. ONE VERY PERSONAL GRUDGE.
03 / LESS LORE. MORE GAMEPLAY.
Press play.
Get judged.
The dogs won’t.”
Your castle. Her rules.
Play the first shareware episode of Wolfenstein 3D.
Original game data loads from the chain into this page.
Calico attitude included. Wallet not required.
No wallet needed · Game data verified before play
Click the game to focus. Keep the in-game view below its maximum size to show the original HUD. The full 640 × 400 frame fits here without cropping.
Under the hood · chain verification & loading log
04 / DYOR, BUT WITH A CAT
Awkward
questions.
Actual answers.
Is this the full Wolfenstein 3D?
No. This build uses the .WL1 shareware data: the first episode. It does not include the other episodes from the full release.
Where can I find the game contract?
The game data registry lists the ordered shard contracts and the payload hash. Its address and connected chain ID are shown in the verification section.
Is every paw swipe a transaction?
No. Your browser runs the game after reconstructing it. Moving around requires no transactions, signatures or wallet.
Do I need a token to play?
No. Playing requires no wallet connection or token purchase. The game data registry shown here is the archive contract, not a token contract.