Gather
Workers mine crystals from the deposits and carry them to the bank. A fuller bank earns more interest, and tempts everyone else.
A round arena, a tower in the middle and a golden hammer on top. Four players, one slice each: put your people to work, raise your staircase and take the field with your hero to defend home or plunder your neighbours. First to the top wins.
The game
Every match is a race: whoever first completes the staircase of their slice and climbs it to the hammer wins. Getting there takes crystals, a well-balanced workforce and a hero who knows when to stay home and when to strike.
Workers mine crystals from the deposits and carry them to the bank. A fuller bank earns more interest, and tempts everyone else.
Ten segments of stone stairs spiralling around the tower, plus watchtowers, huts and totems on your building pads.
Watchtowers shoot at invaders and upgrades make them deadlier. At home your hero heals and protects the workers.
When the portal is charged, step through: rob the enemy bank, hit their workers, sabotage their staircase. Then make it home with the loot.
Management
While your hero fights, your slice keeps running. How you split your workers and what you build decide how fast you climb, and how well you survive the raids.

Five workers, three jobs: gathering crystals, raising buildings and working on the staircase. Move them with a tap from the Workers panel, at any moment.
Too many gatherers and the bank fills up, wasting interest; too few and the staircase stalls for lack of stone. When a raider kills your workers, rebalance fast.

Four building pads, three kinds of building, each with four upgrades to unlock:
Every crystal spent here is a crystal not spent on the staircase.
A match

Bank in the middle, deposits at the bottom, four building pads and the staircase site at the foot of the tower. Your economy runs on its own while you play the hero; one tap on the map and you are back managing it.

Each segment costs crystals and work. Torches mark the consolidations: below them, no sabotage can push you back. Keep an eye on your rivals' pennants, they tell you how close they are to the top.

With the portal charged, pick your target. You only have a few seconds: stand by the enemy bank to fill your backpack, dodge the towers, then reach the arrival portal to head home and unload the loot into your own bank.

Once your staircase is complete, climb. The golden hammer waits on the summit: whoever grabs it first wins the match, and the whole arena watches the winner raise it to the sky.
Alpha
Stair Lords is in alpha: you really play it, online, with complete matches from the first crystal to victory, but the art, the numbers and parts of the interface will still change. The download is open to everyone and free: try it, and tell us what you think.
When a new version comes out the game tells you, and you download the update from here.
Download
The alpha for Android and Windows, free for everyone. The game is played online: an Internet connection is required.
Questions
Nothing: the alpha is free.
No. On first launch the game creates a guest profile tied to your device and you can play right away. To keep your profile when you change device, or to use it on both phone and PC, link a Google account from your profile (Account).
Add them from «Friends» by searching their name, invite them into your Party and press «Play»: you all enter the same match. Bots take any seats left empty.
Yes: the Android and Windows versions meet in the same matches, and a Party can mix both.
A recent mid-range Android phone. The game picks the graphics quality on its own, and you can change it in the options.
That is normal for an alpha without a digital signature: click «More info» and then «Run anyway».