Alien: Isolation levels live under DATA/ENV/ (often as PRODUCTION/<name>). This page lists the common map names you'll see in OpenCAGE's level picker and launch dialog, plus a short description of what each map contains.
LV-426, including the Anesidora hangar and view over to the derelict.
BSP_LV426_Pt02
LV-426, inside the derelict.
BSP_Torrens
The Torrens, including the hypersleep area, canteen, medical area and bridge.
Solace
The interior of the Anesidora.
Sevastopol — Lorenz SysTech Spire
TECH_Comms
Seegson Communications, including the external comms array.
TECH_Hub
The central area of the Lorenz SysTech Spire that the transit connects to. Includes the server hub, archive room and Lorenz SysTech lobby.
TECH_MuthrCore
APOLLO, including the server banks.
TECH_RnD
Gemini Exoplanet Solutions.
TECH_RnD_HzdLab
The Project KG-348 research labs, including the detachable lab.
Sevastopol — SciMed Tower
SCI_AndroidLab
The entirety of Seegson Synthetics — Components Warehouse, Android Disposal, the Synthetic Showroom and Facility Administration. The transit station to APOLLO is here.
SCI_HospitalLower
San Cristobal Medical lower floors, including the Ambulance Bay, Medical Reception, Medical Wards and Operating Theatre.
SCI_HospitalUpper
San Cristobal Medical upper floors, including Dr. Kuhlman's office, Psychiatric Wards, Staff Quarters and Patient Rooms.
SCI_Hub
The central SciMed Tower transit area, leading to upper/lower San Cristobal Medical and Seegson Synthetics. Transit Control is accessed by elevator.
Sevastopol — Solomons Habitation Tower
HAB_Airport
Where Amanda initially arrives on Sevastopol — Spaceflight Terminal, baggage reclaim, Axel's den, and the lower airport where Axel and Amanda meet looters.
HAB_CorporatePent
The Corporate Penthouses, including the two transit waiting areas, canteen, projector room, library, entertainment terminals and games room.
HAB_ShoppingCentre
The Solomons Galleria, including the Marshal Bureau and transit station.
Sevastopol — Engineering Platform
ENG_Alien_Nest
The Hive below the Reactor Core. Accessible through the Reactor Core on mission 14 by elevator.
ENG_ReactorCore
The Reactor Core and Facility Management areas.
ENG_TowPlatform
The Tow Platform, second Hive (plus ruined transit tunnels leading away from it), and docking clamp.
DLC Maps (Nostromo, Survivor Mode, Salvage Mode)
BSPNostromo_Ripley
The Last Survivor DLC map on the Nostromo.
BSPNostromo_TwoTeams
The Crew Expendable DLC map on the Nostromo.
ChallengeMap1
"Blast Seat" — Survivor Mode map from The Trigger DLC pack.
ChallengeMap3
"Overrun" — Survivor Mode map from the Trauma DLC pack.
ChallengeMap4
"Severance" — Survivor Mode map from the Corporate Lockdown DLC pack.
ChallengeMap5
"Scorched Earth" — Survivor Mode map from the Corporate Lockdown DLC pack.
ChallengeMap7
"Reoperation" — Survivor Mode map from the Trauma DLC pack.
ChallengeMap9
"Crawl Space" — Survivor Mode map from the Trauma DLC pack.
ChallengeMap11
"Loose Ends" — Survivor Mode map from the Corporate Lockdown DLC pack.
ChallengeMap12
"Damage Control" — Survivor Mode map from The Trigger DLC pack.
ChallengeMap14
"The Package" — Survivor Mode map from The Trigger DLC pack.
ChallengeMap16
"The Basement" — free Survivor Mode map included with the game.
SalvageMode1
"Safe Haven" — Safe Haven DLC (Gemini Secondary Systems and Bacchus Apartments).
SalvageMode2
"Lost Contact" — Lost Contact DLC (Lorenz Private Wards and S6 Emergency Power Plant).