Welcome to Building 13™, you're home now
A Petra S.F. universe
Building 13™
Welcome to the building. Music leaks through the walls. Comics move after midnight. Stories hide in the archives. The owners are weird. Pick a door.
Welcome home, misfits
Choose your room
Open the doors
No endless link list. Every door opens a real room inside Building 13™.
Broadcast Room
Petra Reacts
Petra hits play. The building reacts.
Story Room
Storytellers Den
Short stories from inside the building.
Mission Control
Music
Building 13™ exclusives
Artifacts
Records that only live inside the building.
Records Room
Comics
Owners
Residents
Commissary
Shop
For hire
Creative studio
Make your business look like a movie.
Game Room
Arcade
Petra's own browser games. No quarters needed.
New Wing · Community
Creator Hub
Independent creators under one roof. Find your people.
New Wing · Promotion
Creator Spotlight
Get your work in front of the building.
New Wing · Every Sunday
Local Spotlight
Petra's weekly picks, local love, prompts and one wild card.
Broadcast Room
Petra Reacts.
Petra hits play. The building reacts. Watch every transmission right here.
Throw it through the door
Submit to Petra Reacts.
Creators, artists, businesses, and beautiful weirdos: send Petra something worth reacting to.
Open the full Petra Reacts playlist ↗No charge Paid option Paid option Paid option
Free reaction
Free
Submit for consideration.
Reaction + Socials All Week
$10
Reaction plus a week of social support.
Pay with Cash App ↗Spotlight on the Site
$20
A dedicated Building 13™ site spotlight.
Pay with Cash App ↗Be A Resident
$30
A paid resident placement inside Building 13™.
Pay with Cash App ↗Story Room
Storytellers Den.
Pull up a chair. Short stories, strange turns, and transmissions from inside Building 13™.
Mission Control
Music.
TRICK OR FUCKIN' TREAT — six tracks, 12:37, and no fake releases mixed in.
Petra S.F. · Out nowOpen in Spotify ↗
01SCREAM, BITCH!
02WHITE PEOPLE IN THE WOODS
03STU MACHER'S IN MY DMS (HE'S ALIVE)
04TRICK OR TREAT, SMELL MY FEET
05I KNOW YOU GOT MORE CANDY
06I WENT TO A HALLOWEEN PARTY, CAME HOME WITH A CURSE
The full Petra S.F. catalog
All the music. One place.
Go beyond the Halloween record. Play Petra S.F. on Spotify and move through the full catalog.
Building 13™ artist exclusives
Artifacts.
Records from inside the building that won’t get pushed wide to every platform. Press play and stay awhile.
Building 13™ exclusivePetra S.F. · Side Quest
Wait... What If I Was In Wu-Tang?
Six tracks. One Building 13™ artifact.
0:003:46
Take the records home.
Records Room
Comics.
Pick a series, choose an issue, and read it page-by-page right here inside Building 13™.
PETRA: Son of the Lightning Reaper
3 issues
Building 13™: The Origin
2 issues
Wattpad transmissions
The Archives.
Incident reports, resident transmissions, lore, and stories from Building 13™. Choose a file to read the full story on Wattpad.
The owners
Residents.
Only the two names on the deed: Petra S.F. and Lady Rissa.
Owner · Entertainer · Storyteller
Petra S.F.
Boston to the Boot. The unreliable narrator at the center of Building 13™.
Owner · Lady of the house
Lady Rissa
Co-owner of Building 13™ and one of the two names on the deed.
Building 13™ records office
Build a Resident.
Create an original resident ID card, watch it update as you type, and save the finished card as a PNG.
Building 13™ Resident FileID // 13
Unregistered
AKA // Unknown
TypeArtist
Gender / Age— / —
ArchetypeUnclassified
Traits // No traits logged.
Commissary
Shop.
Organized by collection. Browse here; the product button opens the exact checkout listing.
Creative Studio Room · For hire
AI Creative Studio — spec work.
See how Petra turns a business into a whole visual world, then hire Building 13™ for custom graphics, promotional video, character creation, story development, audio, and more.
Delta Garden Seltzer
AI Creative Studio spec promo — campaign visuals in motion.
Delta Garden Seltzer
AI Creative Studio spec promo — another angle on the Delta campaign.
Faygo Rock & Rye
Cinematic spec spot. Day one. Faygo. You know the deal.
Need help building worlds, characters, stories, or videos? Come see what we can create.
HTML game
$150
A small custom browser-based game with an agreed scope and defined features. Basic testing and delivery included.
Game + website
$300
A custom browser-based game plus a companion website or landing page, with integrated branding, project links and basic responsive design.
Full custom project
$500+
Larger or more complex creative projects. Custom scope, agreed deliverables, and project-specific pricing and timeline.
Scope affects final pricing on every package — bigger worlds take more bricks. No package promises unlimited features or unlimited revisions at a fixed price; Petra quotes the real number before any work starts.
AI Creative Studio — spec work.
Real spec campaigns Petra made to show businesses what the studio can do. Yours could look like this.
Spec campaign visuals
Delta Garden Seltzer
Spec sponsor pitch
Delta Garden
Spec product campaign
Faygo Rock & Rye
Local business
Butter Krisp
Spec campaign
Willow Pharmacy
Promo graphic pack
$150
A coordinated set of scroll-stopping visuals.
30-second promo video
$300
A short cinematic promo made for social.
Music video — basic edit
$50
Real basic edit shit: your footage, your song, cut clean and synced to the track, captions on it, ready to post. One video, no movie-budget nonsense. Peep one Petra cut himself: “Why Is Everything Okay?” ↗
Album / EP artwork
$150
Cover art with a world behind it.
Event flyer
$75
A single-piece flyer that lands fast.
Make it look like a movie
$500
The full campaign bundle.
Character creation
Get a quote
Custom character design and development shaped around your world.
Story / concept development
Get a quote
Build out a story, campaign idea, character concept, or creative direction.
AI-assisted creative work
Get a quote
Bring your idea to Building 13™ for custom visuals, concepts, and promotional content.
Mix & master
$50 / track
A balanced mix, final polish, loudness, and release-ready delivery.
Beat production / licensing
From $30
Original production and beat leases shaped around your record.
Features
Not available
Petra is not accepting paid feature requests.
Wrong turn, right building
Lost Traveler.
Yo, you look lost. That’s cool — everybody takes the wrong hallway once. Pick what you came for and we’ll point you at the right door.
Listen everywhere
Follow the signal
Shop & support
Stories & neighbors
Two jammed doors: the Xbox destination currently returns a dead page, and the Audiomack tile has no destination attached. They stay off the buttons until there’s somewhere real to send you.
♛ EST. 2026 · NO LATE FEES · BE KIND, REWIND ♛
BUILDING 13 VIDEO
CUZZO'S ARCADE — NOW PLAYING · 19 TITLES★ OPEN LATE · FREE PLAY · NO PLAYS · NO FEES ★
AISLE 13-AHorror
Top-down horror explorer · find 13 relics, don’t attack Reaper.
Monster ID inspection · mirror, UV, banned list — accept or reject.
Elevator horror puzzle · 13 floors, the elevator lies.
Oracle’s after-hours horror cabinet.
Rukus delivers the verdict after midnight.
One more nightmare for the late shift.
AISLE 13-BAction
Wrestling brawler · punches, grabs, suplexes and powerbombs in the halls of Building 13. Keyboard: WASD move, Shift dash, J punch, K grab, L suplex, I powerbomb.
Steampunk platform adventure · bone-charms, bats, 3 sky levels.
Arena survival · fire bolts versus 13 waves.
Sega-style beat-’em-up · punch, spray tags, 3 levels.
Cuzzo takes over the action cabinet.
A fresh run from the back shelf.
Neon trouble in the action aisle.
AISLE 13-CWild Card
Arcade collector · grab candy, dodge BUSTED chasers.
Midnight waffle-shop serve-’em-up · 13-customer rush.
Duo platformer · swap Rissa and Tank the chihuahua.
Vex’s candy-coated wild card.
Breakfast goes completely off the rails.
Blue fire from the wild-card shelf.
— CHECKOUT COUNTER —
NO LATE FEES IN BUILDING 13
All 19 titles due back: NEVER. Membership: FREE FOREVER.
Be kind, rewind. Tell the clerk Cuzzo sent you. ♛ 13
Petra also streams retro games on Twitch · @oopsitspetra
New Wing · Creator Community
Creator Hub.
A living community inside Building 13. Real accounts, real posts — statuses, videos and work from every resident, saved on the Building 13 backend so every visitor sees the same building.
The Hub has its own front door now. The Creator Hub lives at app-building-13.vercel.app/hub — that’s where creators sign up, sign in, post their work and follow each other. Same building, same accounts.
Enter the Creator Hub ↗New Wing · Paid Promotion
Creator Spotlight.
Promotion for independent creators who want their work in front of the Building 13 audience. Pick a package, send your work, Petra reviews every submission by hand.
Real talk: Spotlight features are paid promotions and are labeled as such wherever they run. No package guarantees streams, followers, sales or placement on any third-party playlist — nobody honest can promise that. What you get is exactly what's listed below, delivered by Building 13 on Building 13 channels. Nothing is published until your submission is approved, and no payment is taken on this page — Petra confirms your slot first, then payment runs through Cash App ($petraSF) or PayPal (@officiallkingkudda).
The Spin
$5
- Petra reviews your track for eligibility
- A feature in a Building 13-owned music feature (the Artifacts room and Building 13 socials)
- One promotional shout-out on a Building 13 social channel
Featured Artist of the Week
$15
- Everything in The Spin
- A dedicated promotional graphic / feature post
- Your artist bio and music links in the feature
- Two additional shout-outs during your feature week
- Placement in a Building 13-owned music feature where it fits
Full Promotional Campaign
$30
- Everything in Featured Artist of the Week
- Three additional promotional posts or content pieces
- Release or music-video promotional support
- A custom promotional graphic
- A coordinated schedule so every drop lands on time
Creator Collab
Custom quote
- For AI creators, video creators, comic creators, storytellers, visual artists and game developers
- Tell us the project, the goal and the budget
- Petra builds a custom support plan and quotes it before anything starts
Before you submit
- Send: your name, best contact email, working links to the work, and a short bio.
- Music submissions: one track link per Spin. Campaigns can cover a release or a video.
- Features run after approval and payment confirmation — Petra confirms your slot and start date by email first.
- Approved features are archived in this room once they've run, so your moment stays on the wall.
New Wing · Every Sunday
Local Spotlight.
Petra's weekly drop: his picks, Northshore love, fresh ideas and copy-ready prompts. This edition: Sunday, October 11, 2026. Editorial picks are free and labeled; anything paid is labeled paid.
Petra's Weekly Check This Out
Rumble at Building 13 — the newest cabinet in the Arcade. A wrestling brawler in the halls of the building: punches, grabs, suplexes and powerbombs, all keyboard. It just hit the shelf this week and it's already causing property damage.
Play it in the ArcadeLocal Spotlight
Butter Krisp Diner — Covington, LA. A Northshore staple Petra already put on the wall: the Creative Studio built a full spec campaign for this diner. If you're rolling through Covington, that's your breakfast stop — and if you run a local spot, the Studio can make yours look like a movie too.
See the spec campaignSales & Promos
Creator Spotlight is open. The Spin starts at $5 — a review, a Building 13 music feature and a shout-out. Artists of the Week get the full graphic treatment. And the Arcade stays free play, 19 titles deep, no quarters ever.
See Spotlight packagesWebsite Ideas
- A “New This Week” tag on Arcade cabinets so fresh games pop on first scroll.
- Creator Hub profiles linked straight from Spotlight features, so a feature becomes a front door.
- A request box where residents vote on the next game Petra builds.
Creative Ideas
- Usopp Petra story: “The Night the Arcade Played Itself” — every cabinet lit at 3:13 AM, nobody holding a token.
- A Creator Hub collab comic: four creators, one hallway, thirteen pages.
- Five Nights at Building 13: release the night-shift teaser as a playable Arcade mini.
Wild Card
The 13-Second Story Challenge. Record a full story — beginning, middle, end — in thirteen seconds. Post it, tag it #storytellersden, and Petra's favorite gets read on Story Time. Short leash, big imagination.
Copy-ready prompts
Built for the tools Petra actually uses. Copy one, make something weird, bring it back to the Hub.
Suno · Music
“90s boom bap horror-comedy rap, gravelly storyteller flow, haunted apartment building concept, dusty vinyl drums, deep bass, hook repeats the line ‘you're home now’, 2 minutes, no singing on the verses”
Image · Cover art
“Maximalist horror-poster album cover, haunted 13-story apartment building at night, neon green and purple signage, bearded storyteller silhouette in a doorway holding a microphone like a lantern, dense graffiti detail in every corner, 90s comic-book ink style, no text”
Video · Promo
“10-second vertical promo: camera pushes down a neon-lit apartment hallway toward a door marked 13, door swings open into green light, storyteller silhouette turns to camera and grins, VHS grain, horror-comedy energy, end on black”
Get the app
The Building 13 App
Your whole building. Right from your phone. Two ways in — pick the one that matches your phone. Both open the exact same Building 13: every room, comic, track, and transmission.
Download the Android APK
The Android app is still in the workshop. When the finished file lands, the download button switches on right here. The APK is downloaded directly from this website — Building 13 is not in the Play Store or any other app store, and it doesn't need to be.
Download the Android APKDownload the Android APK — Coming SoonHow to install
- Download the APK. Tap the download button above and the file (Building13HQ.apk) saves straight from this site to your phone.
- Open the downloaded file. Tap it in your notifications, or find it in your Downloads folder.
- Approve the install. Because the file comes directly from Building 13's own website instead of the Play Store, Android will show a security warning and may ask you to allow installs from your browser. That warning is standard for any app installed from outside the Play Store — tap Allow / Install anyway to keep going.
- Launch Building 13. The icon is on your home screen. Walk in.
Install on iPhone
This is not an App Store download. iPhone installs Building 13 right from Safari as a web app — its own icon on your Home Screen, opening in its own full-screen window, same building inside.
How to install
- Open Building13HQ.com in Safari. This only works in Safari — if you're reading this in Chrome or another browser, open this page in Safari first, then follow these steps.
- Tap the Share icon — the square with the arrow pointing up, in Safari's toolbar.
- Choose “Add to Home Screen.”
- Turn on “Open as Web App” if that option appears.
- Tap Add. Building 13 lands on your Home Screen — tap it any time to walk straight in.
You're already running Building 13 as an app — this is it. Welcome home.
Same building, two doors. Nothing here replaces the website — the Android app and the iPhone Home Screen icon both open the same Building13HQ.com, so every room and every update shows up everywhere at once.
