What persists, and what is unknown?
Confirmed: buildings are advertised as autosaved; offline base fighting is advertised. Not documented in the checked materials: inventory/currency persistence, structural destruction persistence, manual-save controls or confirmation, income/cap/multiplier, offline duration and boss/wave continuation. Do not read the promise as an invulnerability or profit guarantee.
Before-leaving audit
Finish any wall or entrance replacement. Check the perimeter and access to each useful position. Look at intended defensive coverage without relying on your character shooting; move out of the way if your body obscures the test. Keep a second usable defensive position if you have built one. Coordinate the end of construction with friends so they know which version you intend to leave. Finally, take your own note or screenshot of the current structure and any visible balance before leaving; these are a comparison baseline, not an earnings forecast.
Why a single good online run is not enough
If your online success depends on you continuously attacking one approach, that run has not tested absent-player defense. If one device covers the only approach, losing its usefulness may leave no alternative. Spread the responsibility between independent useful positions when your equipment allows it, then compare behavior. The material does not prove how offline combat evaluates range or damage, so no offline-ready badge can guarantee survival.
When you return
Compare the structure and visible balances with your own baseline. Note the actual time away and any reported offline result message; do not infer earnings from a number without checking other rewards or purchases. If the layout changed, first check shared editing and the current game notice. If the result differs from your assumption, preserve the observed state and update the build based on the first specific failure. Autosave is not documented as a restore/undo system.
Leave, finish, or test again?
| Before logout | Decision |
|---|---|
| Entrance replacement is unfinished | Finish or restore a complete version |
| Only succeeds while you shoot | Check coverage without active attacks |
| Complete setup with no observed gap | Record a baseline; inspect on return |
Unfinished entrance replacement: finish or restore a complete version before leaving. Completed base that only worked with active shooting: run a clearer coverage check. Completed independent setup with no known gap: record the baseline and inspect on return, while accepting unknown offline limits. This is a preparation checklist, not an income calculator.