Dementium II on Steam: What's New in Atooi's PC Release

Dementium II is a first-person survival horror sequel that originally launched on the Nintendo DS in 2010, and it is now back on PC through a new Steam release from Atooi, the studio run by Renegade Kid co-founder Jools Watsham. Atooi announced a Steam launch on October 20, 2026, and it is the game currently climbing Steam’s new releases chart, so this guide covers what this version is, what changed from the DS original, and how not to mix it up with the older Dementium II HD.

What Dementium II is

The original Dementium II was developed by Renegade Kid and published by SouthPeak Games for the Nintendo DS, releasing on May 4, 2010, according to Wikipedia. It is the sequel to Dementium: The Ward, Renegade Kid’s earlier first-person horror shooter for the DS.

The story picks up immediately after the first game’s ending. You again play as William Redmoor, who wakes up in a treatment facility and gets pulled into a shifting nightmare world. If you have not played the first game, the opening will make more sense with that context, but the sequel is designed to be playable on its own terms.

Why it’s a “back from the team that made it” release

The new Steam listing names Atooi as both developer and publisher and describes the game as restored by the team who made it. That matters because the last PC version of the game was not made by the original developers (more on that below).

What’s new in the Atooi PC release

Based on the Steam page and launch coverage from Gematsu and Playnews, the PC version adds or changes the following:

• Resolution options: up to 4K, or a pixelated retro look that mimics the DS original.
• Single-screen layout: the DS used two screens, so the PC version moves everything onto one screen with an on-screen mini-map.
• Flashlight choice: a classic or a modern flashlight mode.
• Audio option: you can turn off the music cue that signals nearby enemies, if you want less warning.
• Controls: controller support or mouse and keyboard.
• Steam Deck: listed as Steam Deck Verified in Gematsu’s coverage.
• Steam Achievements.

Coverage of the store page also highlights the sequel’s design changes compared with the first game, such as larger environments, more weapons and monsters, save points and an inventory system. Those are part of the game’s 2010 design rather than new PC additions.

What we could not confirm

As of October 2026, none of the sources we used confirmed the launch price or official PC system requirements for the new release. Some outlets initially reported only “October 2026” before the October 20 date was announced. Check the Steam store page for the price in your region and the requirements box before buying, as these details may be added or changed after launch.

Dementium II vs. Dementium II HD: don’t buy the wrong one

This is the most common point of confusion, and it can cost you money. There are two different Dementium II products on Steam.

According to Wikipedia, Dementium II HD came out in December 2013 for PC and Mac without Renegade Kid’s involvement and received negative reviews. In a Steam news post on the HD game’s page, Atooi says it recently took back the rights to Dementium II HD and calls that release “not the version of Dementium II we want people to play.”

The HD version’s store page has shown deep discounts, and key resellers still list HD keys cheaply. Those prices do not apply to the new release. If you want the Atooi version, check that the store page says “Dementium II” with Atooi as the developer, not “Dementium II HD.”

How to get Dementium II on PC or Steam Deck

The only official route we found is Steam.

1. Open the official Dementium II Steam page (app 5342930).
2. Confirm the developer and publisher are listed as Atooi.
3. Check the price, system requirements and Steam Deck compatibility badge on the page.
4. Buy and install through the Steam client, on desktop or on Steam Deck.
5. Before playing, open the options menu to pick your resolution style (4K or retro), flashlight mode and whether you want the enemy music cue on.

If you prefer to play the series in order, Atooi’s PC version of Dementium: The Ward launched on Steam on October 27, 2025. That release was also enhanced for 4K displays and listed as Steam Deck Verified.

Hardware notes

Dementium II started life as a DS game, so it is not a demanding title by modern standards. That said, we have no official minimum or recommended specs for the 2026 release, and the requirements floating around online belong to the older HD version and don’t agree with each other. Don’t rely on them.

A few practical points:

• Steam Deck: with a Verified listing in launch coverage and native controller support, this looks like one of the easier games to play handheld. Confirm the current badge on Steam.
• 4K output: if you play on a 4K TV or monitor, the high-resolution option is the one to try. If you want the authentic DS feel, the retro mode exists for exactly that.
• Controller or mouse: both are supported, so pick whichever you aim better with. Mouse and keyboard tends to suit first-person aiming on PC, while a controller suits couch or handheld play.

Should you play it?

If you played the DS original, this is the first time the original developers have brought it to PC themselves, with sensible quality-of-life options like the single-screen map and optional audio cue. If you’re new to the series and like older, compact survival horror shooters, it’s an easy recommendation to start with Dementium: The Ward and then move on to the sequel.

The main thing to watch is user reception after launch. At the time of writing the release is only days old, so check recent Steam reviews for any reports of bugs or performance problems before you buy. Details in this guide reflect the information available as of October 2026 and may change with patches or store page updates.