The Track Ladder

There is no difficulty slider in Railwake. In its place is a ladder of named tracks, each longer and more dangerous than the last.

Rung	Line	Length	Country
1	Shortline	1,710u	Beach
2	Dust Flats	1,760u	Desert
3	Sleeper Fields	1,810u	Grassland
4	Grey Shore	1,863u	Beach
5	The Long Dark	1,918u	Deep woodland

Past The Long Dark, the ladder keeps generating new rungs — longer again each time, and it never stops climbing. There is no fixed top.

Each named line starts as hard as the last one ended. Danger climbs smoothly across the five: 1 to 5 on Shortline, 5 to 20 on Dust Flats, 20 to 80 on Sleeper Fields, 80 to 320 on Grey Shore, and 320 to 1,280 on The Long Dark. Moving to a new named line adds no extra jump. (The generated rungs after The Long Dark keep their own step.)

The named five are the opening, not the whole arc. They run about two minutes each; a rung at game level 25 runs four, level 50 eight, level 75 seventeen, and level 100 about thirty-five. The country opens up as the lines get longer: salt flats, swamp and badlands arrive around level 25, mountains and jungle around level 50, and volcanic, alpine and underground around level 75. The exotic country is something the ladder reveals over a hundred rungs rather than something spent in the first five.

Unlocking the next rung

Track 1 is always open.
A track opens the moment you complete the one before it — ridden end to end. A 99% run doesn't do it; only reaching the very end does.
The ladder ends at rung 100. There is no rung 101. Rung 100 is the top of the line, not a number the game happens to stop counting at — everything past it would be a different journey.
Your best distance on every line is recorded permanently, shown on the Tracks list, and the live percentage is on the HUD while you ride.
A track is one continuous leg — the platform to the end, no mid-run stops. All your shopping happens between runs, at the Armory and before you Depart; the Depot is the only shop that travels with you.

Why it pulls you upward

The cliff. Each rung is a large step up in danger over the one before it. A line you can clear at 100% with your current gear is one you'll struggle to survive at all one rung up — so you grind distance on the next line and spend what you earn on upgrades between attempts.
The soft cap. Later lines pay better, and upgrade prices climb faster than the income of an easy line can keep up with. Staying comfortable on a line you've already beaten becomes the slow way to progress — the economy nudges you upward rather than gating you.

Boss rungs

Every tenth rung is a boss rung, and it is a step up: on top of the usual rise from one rung to the next, each boss rung doubles the danger, and that jump stays with you for the nine rungs after it. A boss rung also pays a quarter more than it otherwise would.

Danger within a line

Every line starts quiet: nothing spawns in the first 5% of the ride, and the train waits for the map to finish loading before it sets off.

Danger isn't flat along a line — it ramps as you travel further into it, and each rung up the ladder raises that curve again on top. The start of a line is always the easiest part of it, and the far end of a long line is more dangerous than the whole of a short one.

Spawn rate, enemy strength and your rewards all climb as you go, but they do not climb at the same rate, and the difference is deliberate. Enemy strength climbs fastest. The number of bodies on the line climbs far more slowly, so the deep end of a hard rung is not simply the shallow end with more of everything — it is fewer, worse things, with room to breathe between them. Pay sits between the two: a harder kill is worth more, but not in proportion to how much harder it got. That gap is what keeps a late line worth farming instead of worth farming forever.

Track switchers

From rung 11 onward, every line carries one fork. A prompt opens as the train closes on it — take it, or don't; doing nothing keeps you on the line you were already riding. The fork always sits in the same place on a given rung, and always offers the same choice — riding rung 14 twice means meeting the same fork in the same place both times, not a coin flip that might not show up.

The other branch is either Safer (fewer hazards the rest of the way) or Richer (a better payout for the leg, same danger) — never both, and which one a given rung offers doesn't change. Below rung 11, lines run straight through with no fork at all. A rung whose boss fights over the whole line (the Windlass, rung 20) has no fork either.

The country you ride through

Each rung's signature country — the biomes named in the table above — is guaranteed to appear somewhere in that line's run. Everything else about the run — the order of the terrain, how long each stretch lasts, the exact shape of the land, and whether a landmark appears — is drawn fresh. Climbing the ladder brings new kinds of country into reach: the higher rungs add terrain the lower ones never draw from. See The Line & The World for what that country actually looks like.