Quick answer
The Achievements page is the source of truth for the current checklist. Visible Steam descriptions can be followed directly; achievements without a public description should remain marked as hidden rather than being replaced with guesses. This page connects the checklist to a practical route through campaign, Custom, Endless, and module practice.
🏆 Unlock cue: check the activity, confirm the live Steam description, then mark the achievement only after the game reports the unlock.
A practical unlock route
- Finish the early campaign levels while learning the three roles.
- Revisit the fixed late levels through Level Lookup to practise hard modules.
- Use Custom Mode for difficulty-specific goals such as Hard selection.
- Use Endless Mode for wave and time-management goals.
- Mark the achievement only after Steam records it, not when a local attempt looks successful.
Match the achievement to the right activity
| Achievement type | Where to prepare | What counts as confirmation |
|---|---|---|
| Campaign milestones | Campaign Progression and Level Lookup | The campaign completion is recorded in Steam |
| Endless milestones | Endless Mode | The required wave or run is credited after the result screen |
| Custom difficulty | Custom Mode | The selected preset and completed run satisfy the current Steam condition |
| Action or module goals | Relevant puzzle guide | Steam updates the achievement after the action is completed |
This grouping helps you choose a practice route without turning an unlisted condition into a guess. The achievement page remains the checklist; the linked guides only prepare the mode, module, or team routine.
Hidden conditions
The site keeps a hidden-condition label when Steam does not publish a public description. That label is useful: it tells you to confirm the unlock in Steam rather than trust a community theory. If a future update reveals the condition, replace the label with the published wording and keep the date of the check.
Module-related preparation
Use Alarm, Monkey-Says, Maze, and Pressure as focused practice pages. They explain the response pattern without inventing an achievement condition. The roles guide is the best companion when an unlock requires a clean team run.
Steam verification
Steam percentages are snapshots and can change as more players unlock an achievement. Open the Steam achievement page after a successful run, refresh once, and use the in-game or Steam record as the final confirmation.
Before you retry an unclear unlock
Write down the exact mode, level, number of waves, and action you completed. If the achievement still does not appear, check whether the run ended normally and whether the current Steam description changed. Do not fill a hidden condition with a community theory; keep it marked for confirmation until Steam publishes or records the result.