Quartermain and the Cult of Cthulhu

Shooter· Boomer Shooter· FPS· Action-Adventure

Released May 2025

Take up arms against Cultists, Nazis, Robots, and Lovecraftian monsters in this fast-paced action adventure. It’s down to you, Aloysius Quartermain, to sneak a 12,000 year old Artefact out of Nazi Germany by emptying lead into anything that moves.

94% positive · 133 reviews

Done

All announced content has been released

High confidence

Done

All announced content has been released

High confidence

Where to buy

Steam Updated 12 Oct 2026 $2.99

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Evaluation

Quartermain and the Cult of Cthulhu launched on May 22, 2025 as a self-contained retro FPS. The store description presents it as a complete, finished product — a "bite-sized boomer shooter" with a defined feature set and no mention of post-launch content plans. The publisher (DOSMan Games) posted a July 16, 2025 announcement about three entirely separate upcoming games, with no mention of additional content for Quartermain. The most recent developer activity is a November 3, 2025 patch (Version 2.0) that added quality-of-life features like Steam Achievements and quicksaves alongside bug fixes — a polish update consistent with a shipped, complete product rather than a sign of ongoing content development. No DLC has been listed, no roadmap has been published, and no future content for this game has been announced. The game appears to have launched as a finished package and has since received only maintenance and polish updates.

Evidence

DOSMan Games announced three brand-new upcoming titles (BIOMEAT HUSKWORLD, BLOODMATCH, NIGHT JACKAL: BLOOD DEBT), with no mention of additional content planned for Quartermain.

news post · Jul 16, 2025 source ambiguous

medium

Store description presents the game as a complete, self-contained product ('bite-sized boomer shooter') with a defined feature set and no mention of planned post-launch content or expansions.

description source development ending

medium

Media

Details

Developer

ThePrinceOfMars

Publisher

DOSMan Games

Achievements

Platform

Windows

Controller

—

Steam Deck

Not rated

Players

Single-player

Boomer Shooter FPS Shooter Action-Adventure First-Person Alternate History Action Historical Mechs Cartoony Pixel Graphics Demons Fantasy Lovecraftian Military

About this game

Everybody is seeking the Ostium Magicae, a magical artefact capable of transporting entire armies to any location or dimension they desire. It’s fallen into the hands of an acquaintance, and you’ll need to track her down and help her sneak the artefact out of Nazi Germany and out of evil’s hands. It’s time to gear up and show Cthulhu’s minions that it’s not the Unknown they should fear -- it’s you.

Quartermain and the Cult of Cthulhu is a fast-paced retro FPS game taking inspiration from Indiana Jones, Wolfenstein 3D, and tabletop RPGs. With a massive enemy roster, substantial arsenal, and retro soundtrack, Quartermain is a bite-sized boomer shooter primed to offer much bang for your (three) buck(s).