Single-player games like Diluvian Ultra
Below are 8 single-player Steam games similar to Diluvian Ultra, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Diluvian Ultra page.
Ranked picks
- 1
Diluvian Ultra: Awakening
Single-player alternative to Diluvian Ultra — playable solo, no multiplayer required. Shares Action with Diluvian Ultra.
Diluvian Ultra: Awakening shows a never-before seen part of Diluvian Ultra's story, preceding the events of the main game. As a young Diluvian Knight, stage a heroic defense against insurmountable odds, in this single-player FPS with a retro aesthetic and fast-paced, strategic combat.
- 2
Project Warlock II
Single-player alternative to Diluvian Ultra — playable solo, no multiplayer required. Shares Action and Indie with Diluvian Ultra.
Adrenaline-pumping gore retro funhouse that’s full of guns, magic, demons, vertical arenas, 3D visuals, 2D sprites, and heavy metal music. Inspired by FPS classics like Quake and Doom 64, Project Warlock II is the explosive boomer shooter sequel you were too shy to ask for.
- 3
Dread Templar
Single-player alternative to Diluvian Ultra — playable solo, no multiplayer required. Shares Action and Indie with Diluvian Ultra.
Dread Templar is a fast-paced hardcore old-school FPS, combining classic 90s shooter and modern FPS elements. Unlock and combine dozens of weapon upgrades and skills, embrace the Dread Force and obliterate hordes of fiendish enemies. Become the scariest thing in hell and get your revenge!
- 4
Viscerafest
Single-player alternative to Diluvian Ultra — playable solo, no multiplayer required. Shares Action and Indie with Diluvian Ultra.
Viscerafest is a Sci-Fi Fantasy Singleplayer Arena FPS with minor Collectathon elements. Fight through hordes of aliens and eldritch monstrosities wielding a slew of powerful weapons, juggling your resources, and exploring over 23 intricately designed hand-crafted levels.
- 5
HYPERVIOLENT
Single-player alternative to Diluvian Ultra — playable solo, no multiplayer required. Shares Action and Indie with Diluvian Ultra.
An ancient evil has awoken in the depths of a remote mining asteroid, stirred from its slumber by man's lust for power. Unaware, you answer a distress call and become stranded, surrounded by monstrous foes. Unravel the mystery of this madness and stop its spread in this horror retro shooter!
- 6
AMID EVIL
Single-player alternative to Diluvian Ultra — playable solo, no multiplayer required. Shares Action and Indie with Diluvian Ultra.
A retro FPS for the ages! Once branded a HERETIC. Now YOU have been chosen as our champion! Reclaim our sacred weapons. Take back our ancient lands. If you can stand... AMID EVIL.
- 7
Red Faction
Single-player alternative to Diluvian Ultra — playable solo, no multiplayer required. Shares Action with Diluvian Ultra.
JOIN THE REVOLUTION! Lured to Mars by the Ultor Corporation's promise of a better life, thousands have come to seek their fortune and work for the massive mining company. But all is not as it seems. A deadly plague is sweeping through the barracks, and miners suffer daily abuse at the hands of the Ultor guards.
- 8
Beyond Sunset
Single-player alternative to Diluvian Ultra — playable solo, no multiplayer required. Shares Action and Indie with Diluvian Ultra.
Cyberpunk first-person shooter with a rich story and RPG elements. You are Lucy, an enhanced street samurai searching for lost memories. Fight in large, open, interactive levels overtaken by yakuza, zombies, robots and bosses!