Alien Invasyndrome Achievements and Steam Unlocks

Why this page exists

A common search around Alien Invasyndrome is “what are the achievements / how many Steam trophies / can I unlock them all on the Demo.” The honest answer today: the public Steam Demo has a limited achievement surface; the full game achievement list is TBA and may not be final. This page tracks what the Demo exposes, what is implied, and how to read Steam’s progress UI without inventing categories.

Developer Mozu Field / 百舌鳥, publisher Shady Corner Games. Wishlist Steam app 4603980. Full release TBA. Demo content checkpoint: Demo 1.0 hotfix (May 5, 2026) — verify on Changelog. Adult 18+; we describe Steam categories, not scene beats. Hub: Controls Hub.

How Steam achievements work in the Demo

• Steam achievements are tied to the installed build of the Demo, not to a stable “version” of the game. Patch changes can rename, replace, or temporarily disable a category.
• The Demo only exposes progress milestones, not the full unlock set that the full game will likely add.
• Steam Cloud stores per-account achievement state; family-shared accounts see their own progress, not the owner’s.
• Some achievements in early-access Demo builds may have been temporarily removed and re-added later. Always confirm via Changelog.

We will not invent a list. If a category is not on your live Steam page, it is not live.

What categories the Demo tends to expose (based on Steam pattern, not invented)

Steam Demos in this genre typically expose progress categories for:

• First nest bank — your first nest cycle in the Demo slice.
• First capture commit — completing a capture/reproduce beat without immediate detection.
• First hide minute — surviving the ~1 minute detection hide penalty once.
• Doctor event clear — reaching and clearing the Clinic encounter.
• Route A or Route B clear — completing a Security branch.
• Demo end — clearing the boss and reaching the Demo ending.

Categories are observed patterns in the genre and may or may not all appear in this specific build. Verify on Steam before grinding any one of them. Full systems context: How to Play, How to Nest, How to Capture, Doctor, Security Routes.

How to read Steam’s achievement UI

1. Open Steam → Library → Alien Invasyndrome Demo.
2. Right-click → Properties → Achievements (Steam overlay if available).
3. You will see a list of categories with locked (greyed) and unlocked (visible) states.
4. Hover each category for the developer’s description text.

Steam’s overlay may not be enabled. To enable: Steam → Settings → In-Game → Enable Steam Overlay. Note that overlays can introduce hitch — see Performance & Settings if you notice frame pacing issues during capture commits.

What carries forward to the full game

Honest framing: Steam does not guarantee that Demo achievements carry forward. In typical Steam patterns:

• Some early-access Demo achievements count toward global stats but not toward full-game unlocks.
• The full game may have its own achievement list that overlaps, expands, or replaces Demo categories.
• Wishlist + Demo feedback matter more than chasing 100% Demo completion in 2026.

If a category disappears after a Demo patch, it is not a bug — it is the patch’s author changing the list. Move on. Changelog is the canonical signal for “what changed in achievement categories.”

Why some Demo achievements may not unlock

Common reasons, in order of likelihood:

1. You missed a hidden trigger. Some categories only fire on a specific route or room sequence (e.g., specific Doctor event pacing).
2. The category is bugged on your build. Verify on Bugs & Known Issues.
3. The category was renamed or removed. Check Changelog.
4. Your save slot has stale state. A bad resume after a long Security attempt can roll progress back. See Save & Progress.
5. Steam Cloud sync hasn’t reconciled. Toggle Steam Cloud off and on via Library → Properties → General.

Do not install third-party “achievement unlocker” tools. They are not supported, will be flagged as modified builds, and can corrupt saves.

How to maximize your Demo completion

Practical habits:

1. Read the achievement list first. Open Steam’s overlay before you start a run so you know what categories the current build exposes.
2. Plan a route that hits multiple categories. First nest + first capture + first hide minute are often possible inside one Kitchen drill.
3. Save before risky commits. Save & Progress — a bad reload can roll progress back.
4. Confirm Steam Cloud sync. Library → Properties → General.
5. Avoid replaying into a stale save slot. If a slot feels stuck, start a fresh slot.
6. Re-check after each patch. Some categories appear, disappear, or rename.

Tools that reinforce muscle memory: Detection Timer, Nest Checklist, Skill Planner.

What this page will not promise

• A canonical list of every achievement the full game will add. We do not have it; Steam has not published it.
• Categories not present on your live Steam page. If you do not see them, they are not live.
• Tricks that bypass Steam’s anti-cheat for achievement unlock. We will not document them.
• Hidden scene-based achievements. If a category references adult scene content, the wiki stays mechanical.
• Third-party trainers or save editors. They are not part of any honest Demo session.

How achievements fit with the rest of the wiki

Want to do this	Read this page
Understand a category’s trigger	How to Play, How to Nest, How to Capture
Clear the Doctor event for an achievement	Clinic Doctor Route, Doctor
Clear a Security branch	Security Routes, Security Room
Clear the Demo ending	Boss Route, Demo Ending
Fix a stuck achievement	Bugs & Known Issues, Changelog
Fix Steam Cloud sync	Save & Progress, Save File Location

What “100% completion” actually means

On the Demo:

• It means the categories Steam exposes today, on your installed build.
• It is not a permanent state — patches add, rename, or remove categories.
• It does not require adult scene completion. Most Demo categories track systems, not scenes.

On the full game (TBA):

• Steam’s full-game achievement list is not yet published.
• Some Demo categories may roll forward, others may not.
• Plan your Demo time around systems literacy, not 100% Demo completion.

Related pages

• Controls Hub
• Changelog
• Bugs & Known Issues
• Demo Ending
• Save & Progress
• Save File Location
• Roadmap & Release Plans

Bottom line

The Demo exposes a limited achievement surface today. Steam tracks progress per installed build; categories can rename or be removed after patches. Plan your Demo time around systems literacy — How to Play, How to Nest, How to Capture — and treat Steam’s overlay as the source of truth, not this page.