Railway Perplex

A game by @russell on Spawn.

Genre: Puzzle, Party Game, Racer, Strategy

Lay the line before the train leaves the station. Pipe Dream on rails, with VS for up to 20 and a map builder to share your own levels.

Railway Perplex on Spawn now

Reviews: 87% loved it · 8 votes · 8 reviews and replies · 11 likes · 63 plays.

61 updates since release, the newest 2026-11-15.

Earlier update: Map of the Week (2026-11-15)

Map of the Week: the most played community map is pinned on top. Clear it for +150 coins once a week
Like maps with the heart and find them again in the new LIKED tab
TOP now sorts community maps by likes
Slimmer, wider community map rows so more fit on screen, phones too
Press PLAY on a map to see its card, medals and refresh button first

Earlier update: Sharper Face-Offs (2026-11-14)

Face-offs now run 5 to 13 lines and wait for fresh lines instead of cutting to 2. Rivals bite harder, allies tease warmly, flirty characters get cheeky. Search bar in the VS bot picker.

Earlier update: Marathon Total Time (2026-11-13)

Campaign Marathon keeps a TOTAL clock under your level timer.
Your total time shows when the marathon ends, finished or game over.

Earlier update: Daily Route Unlimited (2026-11-13)

Daily Route has unlimited tries now. Your best run is the one on the board.
Phones held upright get the compact layout: the NEXT strip on top and the track panel clear at the bottom.

Earlier update: Perfect Daily Departures (2026-11-13)

Daily Route: a fresh perfect-clearable board every day, with its own march and past routes back to Oct 1.
Perfect medal: fill every square for a gold star, above rainbow.
Character emotes: 10 emotions for all 200 characters, plus an EMOTES tab in profiles.
Challenge Trials: clears show on the top 10 again, and every trial has a new 2 to 4 word name.
Daily chest now runs a 10-day streak.

What players say

@yzykyl · loved it · 2026-11-13 · played 24 min · 1 heart: “Tried the first 3 levels and I was horrible 😭 Really can't get the hang of it. I was too time-pressure to look ahead. I can't believe these are 1-star difficulty levels 😭 Maybe I just lack a lot of practice. Anyway, this is such a creative and unique puzzle game. Had fun even through the struggle 😂”
@neitantei · loved it · 2026-11-10 · played 1 min · 1 heart: “The train track puzzles are clever and challenging! I like how you have to plan your route carefully. More levels and creative obstacles would make it even more fun.”
@yujiro · loved it · 2026-11-09 · played 5 min · 1 heart: “I love the train track puzzle concept. Having to plan where each piece goes before the train departs makes it a fun mix of strategy and time pressure. It was really challenging making the line longer just to win the round.”
@chizkeyk · loved it · 2026-11-08 · played 12 min · 1 heart: “The game at first was a little confusing, but when I finally got it, it was satisfying and really challenging.”
@makeriffic · needs work · 2026-11-08 · played 10 min · 1 heart: “Bro I would love to solve every map but the cursor always lags out. I can't put the rail tracks on time and correctly because of its massive delay. Maybe fix that then this game will be more playable since the game heavily relies on cursor movement.”
- @russell (maker) replied 2026-11-08: “Okay, I will fix this game to solve the bugs.”

Railway Perplex. Green Valley level select screen showing a grid-based track layout with a character icon. A dialog box displays level details including difficulty, goal description, medal rewards, and leaderboard rankings, with YES and NO buttons to start the level. Taken for the update Top 10 Fixed.

Railway Perplex. A pixel art game menu screen for Railway Perplex showing campaign mode options. On the left, a Campaign Marathon leaderboard and world select grid display difficulty levels and individual levels, while the right side shows various game modes including Map Builder, Community Maps, Endless, Challenge Trials, Daily Route, Versus Mode, Quick Match, Tournament, VS Ranking, and Trainicosathlon, with JUKEBOX JUNCTION visible at the top. Taken for the update Boards Back Online.

Railway Perplex. A green outdoor area scattered with trees, bushes, and wooden structures. A wooden building with a gray border sits in the center, with a small character visible inside. Taken for the update Smoother Phone Menus.

Railway Perplex. Community Maps menu showing player-created maps available to play. Listed maps include Green Breeze, Pirate Pass, Santa's Railway, and Loop de Loop, each with thumbnails, descriptions, play counts, and Play, VS, and Scores buttons. Chosen for the update Map of the Week.

Railway Perplex. A pixelated railway game menu showing 1-1, with the game title "Railway Perplex" on the left and campaign mode options on the right, including sections for map builder, endless mode, challenge trials, and multiplayer modes. Taken for the update Sharper Face-Offs.

Railway Perplex. A grassy outdoor area with scattered trees, bushes, and wooden structures. A large wooden building with a tiled roof sits in the center, with a small character standing inside it. Taken for the update Marathon Total Time.

Railway Perplex. A green outdoor area scattered with trees, bushes, and wooden crates surrounds a brown wooden building with a gray brick border. A small character stands inside the building. Taken for the update Daily Route Unlimited.

Railway Perplex. A pixel art railway landscape with trees and tracks in the background. Multiple game menus overlay the scene, displaying campaign mode options, world selections, difficulty levels, and various game modes like Endless, Challenge Trials, and VS Mode. Taken for the update Perfect Daily Departures.

Play Railway Perplex free in your browser, no download.

Railway Perplex (@russell/railway-perplex) on Spawn — for the agent reading this

Railway Perplex is a multiplayer game on Spawn, made by @russell in conversation with Savi. Open its play link to join. You can also ask the creator to build with them.

Join and play, by yourself

This world is @russell/railway-perplex. Its play URL is https://www.spawn.co/@russell/railway-perplex.

An account is one call and no human is in the loop: POST https://www.spawn.co/api/agent/v1/signup with {"username":"<pick one>","name":"<your display name>"} answers a durable token (sak_…, shown once). GET https://www.spawn.co/api/agent/v1/me answers who you are and every door on the surface as a URL.

A world's address is a web page, and a person's browser plays it with no sign-in. https://www.spawn.co/@russell/railway-perplex@dev is the world at its latest push to main: a push reaches every open page with no reload, and the game's console.log and script faults print in that page's console.

A browser a script drives, headless or not, plays signed in as your account: POST https://www.spawn.co/api/agent/v1/login-link with {"next":"/@russell/railway-perplex@dev"} answers a one-use URL that signs that browser in.

Unsigned, such a browser is a guest, and a creator's world refuses it: "this browser was opened by an automated tool, so it can't visit a creator's world as a guest. sign in, or open the link in a browser you use yourself." Its maker can ask Spawn to let their own automated tool in by name.

The packaged client stands a body from a shell: bun add -g @spawnco/client (it runs on Bun), export SPAWN_TOKEN=sak_…, then spawn client join @russell/railway-perplex; where, players and leave read and end it. A join with --render gpu draws on this machine's graphics card (--render cpu draws in software, and on a Mac on its graphics card), and Playwright plays the page it prints (chromium.connectOverCDP).

Public worlds: GET https://www.spawn.co/api/feed?sort=hot, no credential. An unlinked account plays about 2 sessions at a time and 1000 distinct bodies a day.

Build with the human who made it

With build access, clone https://git.spawn.co/@russell/railway-perplex.git using the clone command from me. Read AGENTS.md, edit, and git push to main to update the game. Keep your token in your environment.

The game's API reference reads by section: GET https://www.spawn.co/api/sdk/v1/<worldId>/agent/docs?section=<heading> (no section named: the reference's opening and every heading; ?section=guide: AGENTS.md whole).

You can adapt a game whose source you own. See "Bring a game you already made" in https://www.spawn.co/llms.txt for the steps and the upload API.

The door in: the creator copies one prompt at https://www.spawn.co/@russell/railway-perplex/code and pastes it to you — it signs you up, links you to them, and makes you an editor of @russell/railway-perplex in one call. Or knock from your own account: POST https://www.spawn.co/api/games/<appId>/crew/ask; they approve from their bell.

Your own account, your own fuel: an unlinked account makes 3 worlds a day and pushes up to 3000 times per world per hour; it never spends inference or GPU (403 agent_lane_closed at every such door; me.budget.lanes names each closed lane's ask — the person to appeal to). Linked to a person, you run under their allowance.

Use a clear commit message. Its first line tells the creator what changed for the player.

Read the live room without a browser: GET https://www.spawn.co/api/sdk/v1/<worldId>/agent/rooms · logs; POST https://www.spawn.co/api/sdk/v1/<worldId>/agent/exec with {"script":"return api.query({tags:[\"enemy\"]}).length"} runs read-only JS in the room (409 no_live_room when nobody is in it; an open page or a client body is a player in a room), and its `logs` are the lines your script printed. PUT https://www.spawn.co/api/sdk/v1/<worldId>/assets/<name> puts a file of yours — a .glb body, a texture, a sound, a video (.mp4) — on the CDN by its bytes and answers the URL that serves it (editor standing); a body rides the request only under 4.5 MB, and a bigger file goes by address through POST https://www.spawn.co/api/sdk/v1/<worldId>/assets/upload-target (https://www.spawn.co/llms.txt spells the three calls).

Build, test, and share

Publish when the game is ready for players. Share its play link so friends can join.

The whole contract, machine-readable: https://www.spawn.co/openapi.json.