Diluvian Ultra

Cresthelm Studios · Fulqrum Publishing

Released: Sep 28, 2023
Platforms
Last updated: 15 Sep 2026, 18:25 GMT

Updates & announcements

20 posts

24 Sep 2025Developer post
BOOMSTOCK 2025 is officially live!
It’s time to lock, load, and dive headfirst into the loudest, fastest, and most explosive corner of gaming – the realm of boomer shooters! Until September 27 , we’re celebrating the genre that never dies: blistering speed, oversized arsenals, brutal enemies, and that glorious ret
It’s time to lock, load, and dive headfirst into the loudest, fastest, and most explosive corner of gaming – the realm of boomer shooters!
Until September 27, we’re celebrating the genre that never dies: blistering speed, oversized arsenals, brutal enemies, and that glorious retro feel. BOOMSTOCK brings together the best of old-school action with today’s wild new twists.

To mark the occasion, Diluvian Ultra is being discounted by 50% for the entire duration of the event.

Besides that, we’ve got a special milestone that we’d like to talk about: HYPERVIOLENT has officially left Early Access and is now fully released! There’s no better time to jump in and experience the complete, blood-soaked chaos.
Watch on YouTube
Here’s what’s waiting for you this week:
Play brand-new demos of upcoming boomer shooters and action-packed indie FPS.
Watch fresh trailers & announcements straight from the developers keeping the retro spirit alive.
Grab huge discounts on classic favorites and modern heavy-hitters in the genre.
Discover hidden gems that deserve a spot in your library.
Whether you’re a die-hard Quake veteran, a Doom-slaying purist, or just curious about what “boomer shooters” are all about – this is your festival.

So strap in, keep your finger on the trigger, and get ready for a full week of non-stop action.

BOOMSTOCK is live now – let’s make some noise!
And if you want to be an even bigger part of the BOOMSTOCK community, hop on the official Discord server, where you’ll be able to find all the news and even giveaways!
Original post
17 Jun 2025Developer post
Giveaway: Win One of 5 Steam Keys for Diluvian Ultra
Hello everyone! The Steam Summer Sale is just around the corner, kicking off on June 26, and we’re lining up a pretty substantial discount for Diluvian Ultra. But before the event begins, we’ve got something even better for you: a chance to get the game completely free! We’re giv
Hello everyone!

The Steam Summer Sale is just around the corner, kicking off on June 26, and we’re lining up a pretty substantial discount for Diluvian Ultra. But before the event begins, we’ve got something even better for you: a chance to get the game completely free!

We’re giving away 5 Steam keys for Diluvian Ultra: Chapter One. If you’d like to win one, here’s how to enter:
In Diluvian Ultra, you’ll have access to an arsenal of living weapons, like your sentient Squire Gun, Bella. What other kinds of organic weapons do you think would fit into the game’s universe? What would your weapon do, and what would you name it? Share your ideas in the comments.
On June 24, we’ll choose the 5 most creative entries and reward their authors with a Steam key for the game.
If you're selected, keep an eye on your Steam DMs – that’s where we’ll be contacting the winners.
We’re looking forward to your ideas!

And if you’ve already played Diluvian Ultra and had a blast, please consider leaving a positive review here on Steam. The game hasn’t received many reviews yet, so every single new one significantly helps boost its visibility, allowing more players to discover it. That kind of support is incredibly valuable to us and can make a bigger difference than you might think.

A huge thanks to all of you, our dear Diluvian fans, and good luck in the giveaway.
Original post
24 Oct 2024Developer post
Forgive Me Father 2 is Out of Early Access Now!
Greetings, everyone! Allow us to inform you, loyal players of Diluvian Ultra, that another first-person-shooter from Fulqrum Publishing has just left Early Access and is available now - the game is none other than Forgive Me Father 2 ! Drawing inspiration from various FPS subgenr
24 Sep 2024Developer post
Hotfix for Achievements Is Out Now
Hello everyone! An unpleasant bug managed to fly under our radars when the most recent patch was released and because of it, some of you were unable to unlock achievements in the game. We have now released a hotfix that fixes this issue, meaning you should again be able to unlock
16 Sep 2024Developer post
Diluvian Ultra: Awakening Is Out Now!
Hello everyone! The day has finally come, as a part of the BOOMSTOCK event, we can announce that Diluvian Ultra's prologue called Diluvian Ultra Awakening is launching today. And what's more, the game is available to everyone FOR FREE! We can't describe how happy we are to finall
06 Sep 2024Developer post
Patch 3.5.24 Has Just Been Released!
Hello everyone! Yes, there is a new patch for Diluvian Ultra! Thanks to the support and feedback you keep sharing here on Steam and on our Discord server, we've been able to track down and fix some of the issues that were bothering you, our beloved fans. Full Change Log can be fo
Hello everyone!
Yes, there is a new patch for Diluvian Ultra! Thanks to the support and feedback you keep sharing here on Steam and on our Discord server, we've been able to track down and fix some of the issues that were bothering you, our beloved fans.
Full Change Log can be found below.
Thank you very much for staying with us - while we work on further fixes and even new content for Diluvian Ultra, we cordially invite you to join the Discord server; not only to report more bugs if you find any or share your suggestions, but even just to hang out with the community and the dev team!
Change Log:

fixed weapons sometimes being removed when playing normally past C01L02
fixed weapons being removed when restarting a level after starting to play through an already completed level
fixed levels sometimes becoming locked, preventing further progression
fixed level materials in C01L08 - C01L07 - C01L05
removed an extra yellow key in C01L01
Original post
30 May 2024Developer post
Patch 3.4.52 for Diluvian Ultra Is Out Now!
Hello everyone! New patch for Diluvian Ultra is here! This time, we focused on fixing issues that you reported on Steam and on our Discord . Feel free to read the whole Change Log below. We are still trying to bring the game to the best state possible, so if you encounter more th
Hello everyone!
New patch for Diluvian Ultra is here! This time, we focused on fixing issues that you reported on Steam and on our Discord. Feel free to read the whole Change Log below.
We are still trying to bring the game to the best state possible, so if you encounter more things to be changed or fixed, please, let us know here or on the mentioned Discord.
Cheers and enjoy!

fixed Heartweaver achievement issues
fixed Octodrone healing drones no longer become invincible Randomly
fixed dialogue not progressing when auto skip disabled
fixed dialogue fast forward/next and skip all input names now readable when using a gamepad
improved end of level score screen audio
improved video memory usage
Original post
19 Apr 2024Developer post
Patch v3.4.50 Is Out!
Greetings, everyone, A brand-new patch has just arrived to Diluvian Ultra! We fixed the issue with quitting the game right after using waystones or end stones, and we also added an improved score screen and improved the geometry of the first level in the first chapter. Hope you'r
Greetings, everyone,
A brand-new patch has just arrived to Diluvian Ultra! We fixed the issue with quitting the game right after using waystones or end stones, and we also added an improved score screen and improved the geometry of the first level in the first chapter.
Hope you're enjoying Diluvian Ultra - keep the feedback coming on our Discord serverl, and we will keep improving the game! We hope to see you there soon.
Change Log:

fixes for quitting the game too fast after using a waystone and or end stone
new and improved score screen
improvements to level geometry in C01L01
Original post
07 Feb 2024Developer post
Patch v3.4.06 Has Arrived to Diluvian Ultra!
Hello everyone, You guessed it, we have another patch for you! This one is smaller than usual, but no less important - it should noticeably improve stability and help with one of the most serious bugs. Once again, we cannot thank you enough for providing all the info and bug repo
Hello everyone,
You guessed it, we have another patch for you! This one is smaller than usual, but no less important - it should noticeably improve stability and help with one of the most serious bugs. Once again, we cannot thank you enough for providing all the info and bug reports that allow us to keep making the game better!
Don't hesitate to join our Discord and keep sending that valuable feedback!
Change Log:

further improvements to level select bug fix
stability improvements
Original post
30 Jan 2024Developer post
Patch v3.4.04 Is Here!
Hello everyone! We have good news to brighten your day - a small patch for Diluvian Ultra just went live! It features fixes to some of the unpleasant issues you reported; please keep giving us your feedback, so we can keep improving the game! Thank you very much for your support
Hello everyone!
We have good news to brighten your day - a small patch for Diluvian Ultra just went live! It features fixes to some of the unpleasant issues you reported; please keep giving us your feedback, so we can keep improving the game!
Thank you very much for your support and stay in touch with us here on Steam and on our Discord as well.
Change Log:

fixed weapon wheel freezing for some people
fixed the loss of weapons in a rare case of replaying the same level multiple times
fixed a hole in the hub level where players could still fall infinitely
Original post
23 Jan 2024Developer post
Biggest Discount Ever - Diluvian Ultra Is Discounted by 30% This Week
Hello everyone! We have great news to share! Fulqrum Publishing's sale is here and Diluvian Ultra is getting its biggest discount ever, a whopping 30% off ! Get your copy while you can, discounts like these don't happen every day! And if you want even bigger savings, get yourselv
14 Dec 2023Developer post
Patch 3.3.35 Is Out Now!
Hello everyone! We have a small patch for you before Christmas so you could enjoy Diluvian Ultra as much as possible during the days off! We've managed to fix two serious issues that you reported. Change Log: fixed replaying a completed level removing weapons fixed levels in leve
Hello everyone!
We have a small patch for you before Christmas so you could enjoy Diluvian Ultra as much as possible during the days off! We've managed to fix two serious issues that you reported.
Change Log:

fixed replaying a completed level removing weapons
fixed levels in level select sometimes staying locked
Thank you very much for supporting us, you are most welcome to join our Discord server and chat about the game!
And don't forget that you can still vote for Diluvian Ultra in the IndieDB Awards 2023, where we got to the Top100 and it's only up to you how far we'll get there!
Original post
11 Dec 2023Developer post
We're in TOP 100! Let's push it the rest of the way!
Greetings, everyone! Well, this news completely blew our minds - we made it to the TOP 100 of IndieDB Awards 2023 ! This was possible only thanks to your support - you guys are the best! This nomination alone is a tremendous accomplishment for us, but let's finish this fight and
05 Dec 2023Developer post
Nominate Diluvian Ultra For The IndieDB Awards!
Hello everyone! The mightiest indie game awards are here yet again and we humbly ask for your help with the nominations! Diluvian Ultra has launched this year and thus it can be nominated for "Indie of the Year 2023" ! All you have to do to push the game through the first round i
21 Nov 2023Developer post
Steam Awards Are Here, Nominate Diluvian Ultra and Get the Autumn Sale Discount!
Hello everyone, The time has come again, Steam Awards are coming and Diluvian Ultra can be a part of them! It's only up to you, the players, our beloved community! We believe Diluvian Ultra has a really unique art style and we are really proud of its visuals. That's why we would
10 Nov 2023Developer post
New Patch for Diluvian Ultra is Available Now!
Greetings Everyone, We are happy to announce that thanks to your feedback, we have been able to prepare a second patch for Diluvian Ultra Chapter One, bringing a lot of fixes, but also tweaks and improvement. Please, sharing your thoughts and reporting issues here on Steam or joi
Greetings Everyone,
We are happy to announce that thanks to your feedback, we have been able to prepare a second patch for Diluvian Ultra Chapter One, bringing a lot of fixes, but also tweaks and improvement. Please, sharing your thoughts and reporting issues here on Steam or join our Discord server where you can chat with us directly - you make it possible for us to improve the game as much as we can, and we are extremely grateful for that!
And if you're enjoying Diluvian Ultra Chapter One, we would be incredibly happy if you wrote a review of it here on Steam, it really does help a lot!
Full changelog:

Input bindings now save correctly
Hub level performance improvements
Added gamma slider
Added small enemy encounter before talking to Roxanna
Added energy explosion effect to octodrones
Added blinking button to weapon upgrade screen tutorial
Added dialogue history display order option
Chaingun projectile hit splash improved
Removed flash on bells and forks when used
Bells and forks no longer display text once used
Minor blood rebalance for C01L04
Medium slimes now spawn 2 small slimes if armor is not broken
Reduced blue drone explosion effect count
Reduced brightness of death pit red screen flash
Fixed weapon wheel freezing for some players
Fixed waystone not removing powerups
Fixed elites being launched back when hitting their shield
Fixed varangian guard soft lock on death when jump smashing in phase 2
Fixed new game plus causing issues with level select
Fixed level select randomly greying out levels that are complete
Fixed gunship boss starting after loading the level and improved saving with it
Tutorial text fixes
Fixed poisoned water load issue
Fixed grenades passing through machine doors
Fixed an issue with elevators getting stuck when spamming switches
Texture fixes in C01L04
Fixed several mesh issues with steps in C01L04
Fixed a secret not working in C01L05
Fixed players getting stuck under stairs in C01L05
Fixed some visual door issues in C01L06
Fixed a hole in Myrmidonicus
Original post
20 Oct 2023Developer post
Dev Update on the Present and Future of Diluvian Ultra
Hello everyone! New players, old players and those yet to take the plunge into the world of Diluvian Ultra alike, hear me! Me and the team ( 3 of us in total ) just want to say that for about three weeks now we have watched you play, listened to feedback and noted down issues and
06 Oct 2023Developer post
First Patch for Chapter One Is Here!
Hello everyone! Here we are with the first patch for Diluvian Ultra Chapter One - It is filled with fixes and changes you have been asking for. The full list of changes and fixes is below, but most notable are changes to the audio of enemy barks, fixing many controller issues and
Hello everyone!
Here we are with the first patch for Diluvian Ultra Chapter One - It is filled with fixes and changes you have been asking for. The full list of changes and fixes is below, but most notable are changes to the audio of enemy barks, fixing many controller issues and improvements to the flow of texts.
We are aware that not all reported issues have been fixed, but we decided that publishing an incremental improvement is better than having you wait until everything is done.
There are two issues specifically that we are working on fixing as soon as possible, but can already be somewhat remedied if you encounter them:

There is a bug that can sometimes corrupt a Waystone save and cause you to lose all weapons when you die and respawn. Going to the menu and selecting "restart level" should restore your arsenal, albeit losing the progress you've made in that particular level of course. The bug is difficult to replicate however, and while this worked for us, we cannot guarantee it will work every time - please let us know here in the comments, in Steam discussions or on our Discord server if you encounter this issue and whether restarting the level solved it for you or not. The more details we have, the easier it will be for us to squash the bug!
If you start a game and cannot move and in general it seems unresponsive to any keyboard commands, make sure you don't have a controller plugged in or wirelessly connected - currently it disables the keyboard and "takes over".
If there is something else you want us to focus on, please, leave your feedback here on Steam or join our Discord server where you can chat with us directly!
And if you're enjoying Diluvian Ultra Chapter One, we would be incredibly happy if you wrote a review of it here on Steam, it really does help a lot!
Full Change Log:

Fixed Waystone and powerup messages sometimes staying on screen
Fixed first line of dialogue disappearing too fast
Fixed various controller support issues
Fixed rebinding keys in the main menu not working
Fixed weapon FOV acting strange
Fixes the potential soft lock with events triggered from dialogue
Fixed crash from dying whilst locked in place during dialogue
Fixed AI falling comically slowly
Fixed step-up issues in various maps
Fixed C01L02 collision improvements
Improved forks, now have a muted display when activated
Fixed visual issues with Ion Impaler and heal animation
Improved readability of some map encounters in C01L01
Increased size of chaingun projectile to better read damage type
Changed chaingun muzzle flash to better reflect damage type
Increased amount of blood and ammo in C01L09
Added powerup effects, now have a ring effect to make them stand out more
Improved destructible lattice gibs, now coloured correctly
Updated material for trees
Fixed issues with squiregun guide tutorial text reappearing when you access the waystone again
Lowered the chance of barks and increased the cooldown on them triggering
Lowered the ping audio for enemy barks.
Original post
28 Sep 2023Developer post
Diluvian Ultra Chapter One Is Out Now !!!
Hello everyone, Diluvian Ultra Chapter One has finally arrived along with Realms Deep 2023! The violence bringing Retro pulp FPS is here and available for you to play. Take control of Atilla, an immortal Diluvian Prince, and carve your way through hundreds of enemies who want to
27 Sep 2023Developer post
The Developer of Diluvian Ultra Will Be a Guest on Jared Bair's Stream Tonight
Greetings everyone! The mighty Jared Bair himself has invited the Creative Director of Diluvian Ultra to his live-stream ! The ultimate retro-FPS king will be chatting with him not only about the game itself, but also about the development process and they'll be answering any que

Updates & announcements

Change Log:

Change Log:

Change Log:

Full changelog:

Hello everyone!

Full Change Log:

MORE NEWS FROM REALMS DEEP: