Casualties: Unknown Is Out Now: Price, 15% Launch Discount, 97% Positive Reviews and What’s in 1.0

Casualties: Unknown is out now. The full game launched on Steam on its Casualties: Unknown release date, Monday 9 November 2026, after almost three years of work by solo developer Orsoniks, with publisher Oro Interactive. It costs £18.99 / $22.99 / €21.99, with 15% off (£16.14 / $19.54 / €18.69) until 23 November, and early players love it: 97% of its 767 Steam reviews are positive (as of 10 November).

Casualties: Unknown is an unforgiving cave-exploration survival sim with a simulated heart and limb system: you bandage wounds, fight infections and stop bleeding before you pass out, all while descending through the layers of an alien planet.

Casualties: Unknown at a glance

Is Casualties: Unknown out now?

Yes. It launched on Steam on 9 November 2026, the date Orsoniks announced on 15 October. In his "out now" post, Orsoniks says the full game has twice as many layers as the demo, 40 achievements, several characters and endings, and "a ton" of quality-of-life changes and bug fixes. Bugs can be reported on the game's Discord.

How much is Casualties: Unknown?

£18.99 / $22.99 / €21.99, or £16.14 / $19.54 / €18.69 with the 15% launch discount, which ends on 23 November. The soundtrack (over three hours and more than 50 tracks) is sold on its own or bundled with the game, and there are also bundles with Rain World, Palworld, Barotrauma and Abiotic Factor.

What's in the full game?

The full release adds layers 6 to 11, three separate endings, three playable characters, 40 achievements, and what the developer calls "a truckload" of balance changes, bug fixes and quality-of-life additions. There are 10 main layers plus a shorter 11th layer and an optional bonus ending sequence.

You start as the experiment and unlock the two other species by finishing a run with the previous character. Each has its own stats, quirks and playstyle.

What's in the Casualties: Unknown 1.0 patch notes?

The 1.0 patch notes (which Orsoniks says are incomplete) add, among much else:

• Endless mode and more run settings.
• Item customization: colors and labels for your gear.
• Prosthetics, a less punishing amputation minigame that now works on limbs that aren't infected, and the option to lose both legs.
• Guns are more controllable, and solid buildings now stop bullets.
• New traps, more plushies, new layer art and a choice of measurement units.
• Balance changes to adrenaline, stamina, antivenom and hunger and thirst warnings, which now appear earlier.

What kind of game is Casualties: Unknown?

You're one of thousands of test subjects sent by your captors to retrieve lost cargo from a foreign planet. Each layer brings new hazards, and you have to adapt as you descend. The store page lists:

• A fully simulated cardiovascular and limb damage system
• Character traits to raise on each run: Intelligence, Strength and Resilience
• Crafting to improve your odds, with plants you can use to patch yourself up
• 300 items to find, including loot left by previous expeditions
• Adjustable loot and danger settings from the main menu

Losing a limb isn't permanent any more: a prosthetics system with three tiers was added this year, and the top tier is an upgrade over your normal limbs. Mood matters too, because too much doom and gloom makes survival harder.

Is there a Casualties: Unknown demo?

Yes, a free demo is on Steam and has had big updates, including a reworked heart simulation (v6.0) and difficulty modifiers (7.0). But Orsoniks says the demo won't be updated with the full game's changes, because back-porting them would be too much work.

Is Casualties: Unknown on PS5 or Xbox?

No. Only a Windows version on Steam has been announced.

Casualties: Unknown PC requirements

The minimum specs are very low: Windows 10 (64-bit), an Intel Core i3-8130U at 2.2GHz and 500MB of storage. The game supports 16:9, 16:10 and ultrawide screens.

Watch the Casualties: Unknown release trailer

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