The Can Em All ending takes three steps, and the key you need is not sold anywhere — it is the last node of the normal skill tree, and it costs 666,666,666. Buy it, walk up the stairs, and take the elevator behind the door with the exit sign on it. Walking out through that elevator is what triggers the ending and pops Freedom at Last.

The Can Em All ending and the key that unlocks it

There is no shop, no vendor and no drop for the exit key. Once you have bought every other normal upgrade, one extra node appears in the skill tree. It is priced at 666,666,666 in-game currency, and it is the only thing standing between you and the elevator ride.

That price is a real wall. Saving up 666,666,666 with the base income takes a long time, which is why the permanent earnings upgrades from a factory sale are what make the ending reachable in a reasonable number of days.

Step 1: buy every normal upgrade in the skill tree

  1. Open the skill tree and clear every node except the final one.
  2. Keep earning and selling until the last node is affordable. Nothing else unlocks the ending.
  3. Do not sell the factory at this point. The sell offer arrives by email exactly when the normal tree is complete, and the factory is the thing that pays for the final node.

Step 2: buy the final upgrade for 666,666,666

  1. Return to the skill tree once the money is there.
  2. Buy the final node.
  3. The exit becomes usable. The game treats this purchase as the last debt you owe.

Buying this node and then selling the factory is the one combination that reliably bricks a run — the selling the factory guide explains what goes wrong and how to recover it.

Step 3: take the elevator behind the upstairs exit door

  1. Head upstairs in your factory.
  2. Find the door upstairs marked with the exit sign. It is not on the main floor.
  3. The elevator is behind that door.
  4. Enter the elevator and leave the building. The ending plays, and Freedom at Last unlocks.

Leave through the elevator rather than opening the exit door itself. The door marks where the elevator is; the elevator is what finishes the run. This is the achievement that the achievements guide lists as Freedom at Last, and it is the last item on any 100% checklist.

What the ending leaves you with

The ending does not end the session. You can go back to the main menu, pick Continue, and return to the same factory with everything still in place — the machines, the belts, the upgrades, the money. Play on afterwards if you want to, and sell the factory whenever you are ready.

Two things are worth doing before you sell: check that the feeding totals are where you want them, because buying out the permanent tree resets the fed-children counter, and note that a sale clears the normal tree back to the start. The order that keeps both the ending and the tokens is in the selling the factory guide.

If the ending will not trigger

Two things are usually at fault, and they look identical from inside the game.

The key is still flagged as unlocked from an earlier sale. If you sold the factory after buying the final node, the game keeps the key marked as owned but refuses to let you use it, and trucks stop arriving. Reload the save from the main menu or restart the game — the flag only clears when the game is actually closed or reloaded.

The elevator does nothing. If the elevator opens but the ending does not play, check that every normal node is genuinely bought rather than merely affordable, and that no creature is still alive in the factory.

All three late-run problems have dedicated fixes in the stuck in the endgame guide.