Alien Invasyndrome Wiki
Stealth, nesting, skill trees, and Atlas deck routes for Alien Invasyndrome.
Unofficial Demo wiki for Alien Invasyndrome: stealth, nesting, Security Room routes, skill builds, Atlas maps, and tools.
Adult Only (18+). All characters are adults.
- Jul 24
- Steam Demo store date (2026)
- EN / JP
- Official interface languages
- Atlas
- Ship decks to infiltrate
- 18+
- Adult-only content
Hubs built around what players actually search for before and after each Demo session.
Start here if you want the fastest path through nesting, stealth, and the Demo boss.
Demo Skills Hub
Skills hub for Alien Invasyndrome Demo: skill tree, INT/STR, control/hypnosis identity, evolution paths, early builds, planner.
Read guide CharactersAlien Larva Player Guide Invasyndrome
Alien Invasyndrome larva guide: weak start, nest growth, INT/STR evolution identity, stealth habits, and Demo power curve on Atlas.
Read guide GuidesHow to Play Alien Invasyndrome Demo
Learn Alien Invasyndrome Demo basics: larva movement, softlock hiding, nesting goals, INT/STR spends, and Atlas room flow.
Read guide MapAtlas Overview Alien Invasyndrome Ship Map
Atlas overview for Alien Invasyndrome Demo: ship premise, Top Middle Lower decks, vents, shadows, nest logistics, and routes.
Read guide SkillsSkill Tree INT STR Alien Invasyndrome
Alien Invasyndrome Demo skill tree guide: menu access, INT/STR planning, WIP quirks, nest gates, and unlock priority tips.
Read guide WalkthroughAlien Invasyndrome Demo Walkthrough
Full Alien Invasyndrome Demo walkthrough covering intro, nesting, skill tree, Kitchen, Security A/B, boss, and Demo end.
Read guide ControlsTitle Screen Save and Skip Intro
Alien Invasyndrome title screen: skip opening with Confirm, recall provisional save with key 1, diagonal move notes for Demo starts.
Read guide GuidesFirst Session Plan for Alien Invasyndrome Demo
45–60 minute Alien Invasyndrome Demo first session: Steam install, locale, softlock drill, nest bank, Kitchen scout, stop before Security.
Read guide UpdatesAlien Invasyndrome Demo Scope Guide
Alien Invasyndrome Demo scope: what Demo 1.0 hotfix includes, TBA full-game gaps, save friction, and honest wishlist expectations.
Read guide GuidesCharge and Pounce Guide Alien Invasyndrome
Alien Invasyndrome charge and pounce: stealth charge bugs, commit timing, desk cancel habits, and safe strike windows on Atlas.
Read guide GuidesHow to Nest Guide
Alien Invasyndrome nesting guide: when to start a nest, how stealth and INT/STR affect success, and safe room picks on Atlas.
Read guide GuidesSecurity Boss Prep Alien Invasyndrome
Alien Invasyndrome Security-to-boss prep: room gimmicks change boss difficulty, death retries from room entry, nest and stealth readiness.
Read guide GuidesSoftlock Fixes Guide
Fix Alien Invasyndrome softlocks: desk hide traps, lab furniture sticks, detection waits, charge-hide bugs, and safe Demo retries.
Read guideFive steps that stop most early softlocks and wasted detection timers.
- 1
Confirm Demo access & PC specs
Wishlist on Steam, then read Demo Access and System Requirements before installing.
- 2
Learn the stealth loop
Follow First Session, then How to Play, Stealth and Detection, How to Hide, Title Screen, Charge and Pounce, and Common Mistakes so detection penalties do not eat your hour.
- 3
Nest and capture with a plan
Follow How to Nest and How to Capture, and keep the Nest Checklist open.
- 4
Clear Clinic, Lab & Security routes
Study Clinic Doctor Route, Lab & Cafeteria Route, Storage and Corridors, Drones and Alarms, Trap Skill, Security Soldiers, Security Room, and the Demo Walkthrough.
- 5
Track versions and finish the boss
Check Demo Scope, Changelog / Version History, then use Boss Route, Security Boss Prep, How to Beat the Boss, Demo Ending, and Softlock Fixes.
Jump into Atlas layouts, skill planning, and character notes without hunting random tabs.
Map hub
Atlas map hub for Alien Invasyndrome Demo: decks, key rooms, Middle Deck Loop drills, vents, Security routes, and stealth links.
View all Map SkillsSkills hub
Skills hub for Alien Invasyndrome Demo: skill tree, INT/STR, control/hypnosis identity, evolution paths, early builds, planner.
View all Skills CharactersCharacters hub
Alien Invasyndrome Characters Hub: Atlas crew patrol roles, Clinic doctor encounters, and mechanical NPC notes for the Demo.
View all CharactersLightweight helpers for builds, nest checklists, and detection cooldown planning.
Tools hub
Alien Invasyndrome Demo tools hub: skill planner, nest checklist, and detection timer for Atlas stealth practice sessions.
View all Tools ToolsSkill Planner Alien Invasyndrome
Interactive skill planner for Alien Invasyndrome Demo: balance Stealth, Nesting, INT, and STR before your Security push.
Read guide ToolsNest Checklist Alien Invasyndrome
Interactive nest checklist for Alien Invasyndrome Demo: nest site, softlock, Kitchen/Clinic scouts, spends, and Security prep.
Read guide ToolsDetection Timer Alien Invasyndrome
Detection timer for Alien Invasyndrome Demo: practice the ~1 minute hide window with a default 60-second mm:ss countdown.
Read guideRoute the Demo boss, check progress milestones, and read a grounded Demo review.
Walkthrough hub
Alien Invasyndrome Demo walkthrough hub: Kitchen, Lab & Cafeteria, Security A/B, Boss Route clear order, plus Middle Deck Loop.
View all Walkthrough ReviewReview hub
Alien Invasyndrome Review Hub: Demo impressions, pros and cons, soundtrack notes, and wishlist advice for Steam.
View all ReviewControls · Updates
Controls hub
Alien Invasyndrome Demo controls hub: keyboard binds, stealth actions, save and progress, Locale Emulator, system requirements.
View all Controls UpdatesUpdates hub
Alien Invasyndrome Updates Hub: Demo 1.0 hotfix notes, Demo scope, version history, Dev Progress, Steam wishlist status, and Demo access.
View all UpdatesWiki FAQ
Quick answers to common Alien Invasyndrome questions.
What is Alien Invasyndrome?
An adult stealth-action Demo from Mozu Field where you play a weak alien larva aboard Atlas, capturing crew, building a nest, and evolving skills. Wishlist it on Steam.
Is this the 1987 Sega game Alien Syndrome?
No. That arcade classic is unrelated. This wiki covers Mozu Field’s Steam Demo Alien Invasyndrome (app 4603980). See vs Alien Syndrome.
What is the latest Demo version?
A 21 August 2026 re-check: Steam Demo app 4830300 store-released 24 July 2026; content trackers still nickname the slice Demo 1.0 hotfix (May 2026). No new Steam news. See Platforms & APK, Demo Scope, Changelog, and Version History.
Is there an official Android APK?
No. Steam lists Windows only. Ignore third-party APK mirrors — see Platforms & APK and Demo Access.
Is this wiki official?
No. This is an unofficial fan resource. Confirm releases on Steam or the developer Patreon.
What languages does this wiki support?
This wiki is available in English and 日本語. The Steam Demo UI and subtitles are in English and Japanese. On non-Japanese Windows where Japanese text renders incorrectly, use Locale Emulator.
Where should absolute beginners start?
Start with Alien Larva and How to Play, then Controls, then the Demo Walkthrough.
Does the Demo have a save system?
Some builds were criticized for unreliable saves. Learn title-screen key 1 recall on Title Screen, then read Save & Progress and Updates for version notes.
Is the game available in Japanese?
Yes. Steam lists English and Japanese. Older builds may need Locale Emulator.