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A modern, yet classic sci-fi roguelike,
spiritual successor to D**m, the Roguelike.

An epic battle of a lone marine against the forces of hell,
taking place on the moons of Jupiter.



Jupiter Hell 0.9.5 - Advance!

Jupiter Hell 0.9.5 - Advance!

Time to bring the game to the next level with 0.9.5 "Advance"! Three major pillars of this release are new Traits (and improvements to old ones), fully perk-based ADV equipment, and a new perk-based item modding system - read all about it below!

Character Advancement

Four new traits have been added, each with an important role to fill.

Marine got Army Surplus, which is his way to deal with ammo shortage. Useful on challenge runs, and when Bulletstorm is eating way to many bullets.

Scout gets two new traits - first is Executioner, which buffs both early- (and late-) game melee, and also close-range shotgun or SMG play as well! That trait is borderline overpowered right now, so be sure to play around with it before we nerf it :). The other trait is Stealth Hack - which starts off a possibility of hacking builds for Scout - these will become more powerful with the next release (Terminal).

Tech gets Toxicologist, which we hope will become a base of builds of its own - starting what we hope will be elemental builds for the various classes (more such traits will come later). Changing your defensive Smoke screen skill to a offensive toxic cloud can be quite fun!

Apart from that, there are slight changes in some traits (i.e. Dash and Assassinate got slight nerfs due to Executioner), some overhauls (Tough as Nails now grants raw armor value, like it did in DRL), and improvements (Bloodhound has a short-range heat vision, Powerjack works with stations and ammo terminals), as well as a big buff to Adrenaline - now costs 30 Fury irrespective of difficulty and grants a 5-second buff that protects from pain.

ADVanced Equipment

We removed all non-perk based stat changes for ADV equipment - all stat changes are now based on perks and the perk amount (and quality) depends on the ADV item tier. Those perks are now also displayed in the postmortem for you to brag about if you find a particularly broken piece.

All non-ADV AMPs have been removed, and instead ADV general AMPs have been introduced.

The perk pool has been significantly increased, mostly for general AMPs but also for headgear, armors and weapons.

ADV Perk-based Modding

The old trio of Accuracy, Bulk and Power packs is still present, but instead of increasing stats, they provide a choice of perks you can apply to your equipment. Usually you pick one of two, but Whizkid increases the pool size. The perk pool is deterministic and depends on the item type and group.

ADV weapons have the regular amount of mod slots, so this can get to a ridiculous number of perk counts.

We are aware that this, along with the ADV changes, actually makes the game a bit harder, but also allows for more diversity in items (instead of just counting on a high-damage ADV pumped with P-mods). The trait changes offset this a bit, and further balance changes should bring the difficulty back to what it was.

Medkit and Stimpack Improvements

All medkits and stimpacks clear all negative buffs. Additionally, stimpacks protect the user from negative buffs for the duration of the Stimmed buff.

Other Balance Changes

We buffed all mid-tier melee weapons to make the progress between them more fluid. Knife and Demonic Sword stay the same, chainsaw got a small nerf - all others do more damage.

Angel of Mercy now won't reduce health from exalted kills which should bring it a bit closer to "doable" on Nightmare.


Most notably, enemies won't accidentally melee each other - which prevents unintended infighting and protects the player from friendly melee attacks. Assassinate now properly works on the secret level, and there won't be any more secure vaults on Asterius (which could block game progress completely). Read the full changelog below for more:

Full changelog

Beta   0.9.5 - Advance - October 29, 2020
NEW    #1210 - Trait - Marine - Army Surplus!
NEW    #1208 - Trait - Scout - Executioner!
NEW    #1097 - Trait - Scout - Stealth Hack!
NEW    #1208 - Trait - Tech - Toxicologist!
NEW    #1205 - mods overhaul - mods now grant keywords!
NEW    #1192 - general utility ADV AMPs added
NEW    #1192 - several new AMP, armor, head perks added
NEW    #1192 - ADV perks displayed in post mortem
CHANGE #1216 - all med and stimpacks clear negative status effects
CHANGE #1216 - stims protect from all status effects for duration
CHANGE #1205 - Whizkid increases also perk selection when modding
CHANGE #1192 - ADV weapons may roll with multiple status effects
CHANGE #1192 - removed all non-ADV amps, AMPs are perk-only
CHANGE #1192 - all ADV armors, helmets, visors are perk-only
CHANGE #1192 - all ADV weapons are perk-only
CHANGE #1208 - Nerfed Assassinate due to Executioner
CHANGE #1208 - Dash no longer provides a crit-chance bonus
CHANGE #1097 - Scout loses packrat, Scavenger now reqs Gun Hoarder
CHANGE #1210 - Adrenaline now adds buff that protects from pain
CHANGE #1210 - Adrenaline costs 30 Fury independent of difficulty
CHANGE #1210 - Bloodhound additionally detects enemies at range 2
CHANGE #1210 - Tough as Nails grants armor instead of pain reduct
CHANGE #1210 - Reloader - L1 is -50% when empty, L2 gives 50% DR
CHANGE #1210 - Powerjack - works with stations and ammo terminals
CHANGE #1215 - buffed all mid-range melee weapon damage a bit
CHANGE #1212 - Angel of Mercy wont reduce health for exalted kills
FIX    #1208 - Energy Leech was giving 1 point too much energy
FIX    #1207 - Assassinate now properly works on secret level
FIX    #1208 - no more secure vaults on Asterius
FIX    #1209 - enemies will no longer accidentally melee attack
FIX    #1214 - fixed cleared events/levels on Nightmare!

What's next?

Initially, this update was supposed to be "Terminal" with improvements to terminals and hacking, but we got sidetracked with a revamp of the ADV and modding system. Hence, 0.9.6 Terminal is coming next - expect it within 3-4 weeks from now!

P.S. There are some issues with OSX builds, we're working on them right now!

EDIT : 0.9.5a hotfix!

FIX    - fixed values for Critical, Molten, Barbed and Guarded mod perks
FIX    - ADV dual shotgun has now proper amount of mod slots
CHANGE - single shot auto weapons now have perks at level 4 instead of 1
CHANGE - armors can be modded multiple times with the same mod (Whizkid)
CHANGE - Assassinate nerfed - no more refund, no critical damage bonuses
Note to OSX users on Steam - Mac version should now work, however the directory structure has changed, hence did the location of the player data. If you want to restore your player data you need to copy it from the old location:
$HOME/Library/Application\ Support/Steam/steamapps/common/Jupiter\ Hell/ 
$HOME/Library/Application\ Support/ChaosForge/JupiterHell

You'll be interested mostly in player.dat, maybe configuration.lua.


Jupiter Hell is a roguelike set in a 90's flavored sci-fi universe. Set on the moons of Jupiter, the game pits a lone space marine against overwhelming demonic forces. Rip and tear zombies, demons and unmentionable monstrosities, using classic weaponry such as shotguns, chainguns, railguns and the trusty chainsaw. All to the shine of CRT monitors and the tune of heavy metal!

Dive deep into a true form of the 30 year old roguelike game genre that has resurged in popularity. Experience turn-based, grid-based permadeath and fully procedural levels, all in glorious 3D visuals. Get ready for the spiritual successor to DoomRL, the parody roguelike that years ago streamlined the traditional format and popularised a new wave of accessible roguelikes. Distilled, hardcore gameplay, fast-paced challenge and limitless death all await.

Welcome to Jupiter Hell.


True Roguelike!

  • Permadeath adds tension and significance to gameplay decisions
  • Turn-based and grid-based world to emphasise tactical decision making
  • Procedural environments mean you never know what’s lurking behind the next corner
  • Brutal but fair difficulty will have you constantly coming back for more

Fluid Gameplay

  • Dynamic turn-based action with adaptive animation lets you play at your own pace
  • Intuitive UI for clear and fast decision-making
  • Streamlined gameplay centres on the action instead of micromanagement
  • Action-centric game flow with repeated peaks of blood-stained joy

Smart Procedural Generation

  • Sadistic algorithms create unending challenges
  • Randomised missions intertwine with adaptive plot arcs for continuous variety
  • Generated events and environmental interactions keep you constantly engaged
  • Built upon decades of expertise in producing truly engaging procedural content

Limitless Challenge

  • Highly varied enemies require different strategies to beat, especially in combination
  • Unique enemy behaviours and skills
  • Legendary boss battles that will test your worth as a player
  • Advanced difficulty modes and special challenges for the most masochistic players