Unlock Survival for extended loot

The mission selector for any map whose Campaign mission you have completed.

Before you go

Open the map selector and choose a map whose campaign you have already cleared.
Select Survival from the mission-type options.
Choose a difficulty that your current defenses can sustain.
Use each build phase to inspect lanes, collect available resources, and repair or reinforce the setup.
Start the next wave only after addressing obvious weak points.
Collect useful loot between waves and keep track of the pressure on crystals and defenses.
End the run when the risk of losing a long session outweighs the value of another wave.

Unlocks are map-specific; clear a map’s campaign if Survival is not available for it.
Use a lower difficulty to learn a map’s longer-wave demands before pushing upward.

Survival can be started again after a campaign clear; extended waves and drops repeat, but individual items are not guaranteed.

Assuming one campaign clear unlocks every map: complete each map you want to play in Survival.
Continuing into failing waves for marginal loot: leave while the run remains under control.
Starting without inventory space: clear room before extended farming.

Stop when your build is no longer holding safely, or switch maps when the current route’s drops no longer suit your goal.

Sources & fact checks

Open a guide to find other locations and see what the item is used for.

Survival and pets

Completing a map’s campaign mission unlocks its Survival mode for continued waves and additional loot opportunities.