Experience hardcore, sci-fi dungeon crawling in this dark, atmospheric roguelike. Xenomarine offers tactical turn-based combat with hundreds of unique items and upgradable weapons and armor, as well as massive replayability thanks to its randomly generated content.
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Release Date:
Oct 25, 2017

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Early Access Game

Get instant access and start playing; get involved with this game as it develops.

Note: This Early Access game is not complete and may or may not change further. If you are not excited to play this game in its current state, then you should wait to see if the game progresses further in development. Learn more

What the developers have to say:

Why Early Access?

“Xenomarine is already a game with high replayability due to its infinite, randomly-generated levels, 120 alien species and hundreds of weapons, armor and other equipment. But through Early Access, the game will see continuous further improvements and much more content that will make it the rich, complex and demanding game I know it can be.”

Approximately how long will this game be in Early Access?

“This is a long term project and I expect to keep adding new features and content until this is the best game it can possibly be. However I currently expect to release Version 1.0 during 2018.”

How is the full version planned to differ from the Early Access version?

“The main difference between the Full Version and Early Access will be more in-game content: new weapons, armor, and items with unique abilities; many new alien species; and new map features, missions and other game features. Although the Early Access already features an infinite number of levels, as development progresses there will be ever-greater variety in the later levels. (NB because of these limitations in content, the current Early Access may start to feel a little repetitive after around level 15; by contrast the full game should sustain interest and variety for as far as you are willing to go!)”

What is the current state of the Early Access version?

“Xenomarine has been in development since early 2015 and is largely stable and very much a playable game. As mentioned the Early Access version already features infinite levels, 120 alien species and hundreds of weapons, armor and items with unique abilities. Xenomarine is available for PC, Mac and Linux and is designed to suit keyboard-only, mouse-only and mixed controller preferences.”

Will the game be priced differently during and after Early Access?

“There will be no significant price difference, however the final game price may be a little higher than in Early Access.”

How are you planning on involving the Community in your development process?

“Xenomarine’s development has been very much influenced by the roguelike community, particularly on Reddit. There has also been regular community engagement on Twitter . I’m always on the look out for feedback to help shape development of the game, and welcome any and all comments on the game discussion board!”
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Recent updates View all (9)

February 12

Alpha 4.3: Patch Notes

This release adds 12 new base item types with new game mechanics, including some high-level alien tech and...jetpacks! Also some much-need bugfixes.


NEW: 3 new base stimpack types (each with many variants)
NEW: 4 jetpack types
NEW: Energy barrier
NEW: Hyper-teleporter
NEW: 3 new alien globe types (each with many variants)


MOD: when right-clicking usable to add to quickslot last slot is selected by default rather than first
NEW: can now use 'enter' key from new game panel to start new game
NEW: improved size, look and location of inventory contextual menu
FIX: some annoyances relating to selection of inventory items


NEW: sound effect for aliens pushing aside floor tile
MOD: Trilinear filtering added to player, alien and level sprites (less pixellation)


FIX: bug with player armor resistances not protecting against enemy status effects
FIX: problem (in some resolutions) with overlapping text in link from controls screen to setting screen
FIX: total number of log messages shown reduced to ensure most recent log messages always fit in log
FIX: bug where log message not shown when using item from inventory
FIX: bug where batteries do not charge energy fields
MOD: it is no longer possible to target friendly mobs
FIX: auto-target no longer targets friendly units
FIX: bug causing occasional 'teleportation' when activating auto-mouse-movement by clicking on inaccessible square
FIX: error in probability for success when using mind globe
FIX: bug allowing enemies to move twice when pressing 'f' to attack with throwing weapon or other device
FIX: bug with inventory contextual menu for weapon enhancements and batteries
FIX: mousehover info for aliens now includes special powers (e.g. regeneration) where appropriate
FIX: bug where character screen does not show impact of 'weakness' status on 'to hit'
FIX: bug where combat drones ignore effects of player cover when firing from a distance
FIX: corrected description of dual-wielding skill in terminal screen

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January 11

Alpha 4.2: Patch Notes

As aliens coming up through the floor proved to be quite a popular idea, in 4.2 this happens more frequently, meaning you are never quite safe from the alien threat! In this patch there are also more weapons, and - finally - the ability to close doors!


NEW: 8 new weapon types


NEW: aliens now come up through the floor more often and at random (rather than just for missions)


NEW: close doors with 'right-click' or 'o'-key


NEW : mouseover info for aliens now includes health, attack damage and attack type if player has previously killed aliens of that type.
MOD: shooting an alien on same tile as trap now triggers trap
MOD: aliens hatching from eggs are less dangerous types on average
FIX: bug where shooting at teleport trap teleports self
FIX: incorrect mousehover info for 'open door' and 'floor with hazard markings'
FIX: ability to dual-wield no longer affected by 'to hit' penalties, e.g. from illness
FIX: error in number of targets in mission description for 'drone virus' and 'plant life' missions
FIX: scanner sound effect not playing for some scanner types



It will sometimes not be possible to continue a saved game with a new patch such as this one. If you prefer not to update until you have finished your existing run, either change your Steam update settings, or 'roll back' to the previous version

To do this first quit and reopen Steam, then right-click Xenomarine in your game library and select ‘Properties’. Then go to the ‘betas’ tab and choose the version called ‘lastversion’ from the dropdown. When you close the window Steam should roll back the game automatically.

Then when you are ready to upgrade, follow the same procedure but select ‘NONE’ from the drop-down.

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About This Game

XENOMARINE is a dark, atmospheric, sci-fi/horror themed roguelike in which you play a space marine exploring an alien-infested space station. Starting out with little more than a crowbar, you will fight to survive against over 120 increasingly powerful alien species, as you progress as far as you can through infinite randomly generated levels.

With no starting classes, develop your character into the ultimate fighting machine by means of in-game choices: create a unique build each time you play by finding and choosing between a large and distinctive range of unique usable items and individually upgradable weapons and armor. And although the focus in Xenomarine is on items rather than skills, there are also 70 skill levels to be learned you gain experience from combat and from randomly generated missions.

WARNING: This game is unforgivingly hard: expect to die soon and often when first starting out! Also, in the default 'roguelike' game mode, death is permanent - meaning you will have to start again from level 1. But don’t worry: each playthrough will be different because so many parts of the game are randomly generated (in a way that’s carefully fine-tuned for balance).

PLEASE NOTE that due to the limited content in the current Early Access version, the game may start to feel a little repetitive, especially after level 15 or so. There will be much more content as development proceeds, making each playthrough more and more unique.

*This game contains flashing images and may not be suitable to all users*


You are a Xenomarine, stranded in a dark alien-infested space station. Your squad are all dead, and you have nothing but a crowbar, a torch running low on power and some battered armor. Death is certain,  but you're sure as hell going to take as many Xenos as possible down with you before you go! And you've not forgotten the rumours that there's powerful ancient alien tech to be found...

Features Of Xenomarine Early Access

  • Rich, Tactical Turn-based Combat
  • infinite, randomly Generated Levels
  • Atmospheric lighting and procedurally generated sound effects
  • Unique useable items such as scanners, forcefields and night-vision goggles
  • 10 alien types with 12 variants each, making 120 enemies: all with unique behaviours
  • No starting class: develop your class on the fly with over 70 skill upgrades
  • Multiple damage types and status effects
  • Crafting (craft items from scrap and upgrade weapons and armor)
  • Hack drones; deploy traps; find and use mysterious alien tech
  • Random mini-quests
  • Intuitive user interface, with mouse-only and keyboard-only support

System Requirements

Mac OS X
SteamOS + Linux
    • OS: Windows XP SP2+
    • Processor: SSE2 instruction set support
    • Memory: 2 GB RAM
    • Graphics: Graphics supporting DX9 or DX11 with 9.3 capabilities
    • Storage: 200 MB available space
    • OS: Mac OS 10.8+
    • Processor: SSE2 instruction set support
    • Memory: 2 GB RAM
    • Graphics: Graphics supporting DX9 or DX11 with 9.3 capabilities
    • Storage: 200 MB available space
    • OS: Ubuntu 12.04+ / Steam OS+
    • Processor: SSE2 instruction set support
    • Memory: 2 GB RAM
    • Graphics: Graphics supporting DX9 or DX11 with 9.3 capabilities
    • Storage: 200 MB available space
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