Single-player games like illWill
Below are 16 single-player Steam games similar to illWill, 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 illWill page.
Ranked picks
- 1
AMID EVIL
Single-player alternative to illWill — playable solo, no multiplayer required. Shares Action and Indie with illWill.
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.
- 2
Devilated
Single-player alternative to illWill — playable solo, no multiplayer required. Shares Action and Indie with illWill.
Devilated is an ultraviolent RPG old-school shooter where you brutalize and cannibalize your demonic foes in equal measure. Eat their face before they eat yours.
- 3
Forgive Me Father
Single-player alternative to illWill — playable solo, no multiplayer required. Shares Action and Indie with illWill.
Forgive Me Father is a dark retro horror FPS set in a comic book style world inspired by the novels of H.P. Lovecraft. As the only one left with full senses, you begin a journey in search of answers and relief. How long can you last?
- 4
WRATH: Aeon of Ruin
Single-player alternative to illWill — playable solo, no multiplayer required. Shares Action with illWill.
Blast, slice and shred through your enemies in this hardcore FPS inspired by the icons of the '90s, powered by the legendary Quake-1 Tech. Taking place in a realm left to rot, take up arms, unearth long-forgotten secrets and hunt down the Guardians of the Old World.
- 5
DUSK
Single-player alternative to illWill — playable solo, no multiplayer required. Shares Action and Indie with illWill.
Battle through an onslaught of mystical backwater cultists, possessed militants & even darker forces as you attempt to discover just what lurks beneath the Earth in this retro FPS inspired by the '90s legends.
- 6
INCISION
Single-player alternative to illWill — playable solo, no multiplayer required. Shares Action and Indie with illWill.
Ultraviolent, fast-paced, merciless retro FPS action. Slaughter your way through nightmarish industrial mazes, transformed cityscapes, and surreal alien structures to cut down the Growth.
- 7
Bloodhound
Single-player alternative to illWill — playable solo, no multiplayer required. Shares Action and Indie with illWill.
Crush the cult of Astaroth and vanquish her hellspawn, make them squeal and hide where they came from. Enjoy a Fresh Look & Old Fun in this arcade horror FPS game inspired by the legends of the 90s.
- 8
KINGDOM of the DEAD
Single-player alternative to illWill — playable solo, no multiplayer required. Shares Action and Indie with illWill.
Immerse yourself in a dreadful hand-drawn horror world and push Death’s armies back to the underworld!
- 9
Turbo Overkill
Single-player alternative to illWill — playable solo, no multiplayer required. Shares Action and Indie with illWill.
Enter Paradise as Johnny Turbo—half-metal, half-human, all-murder machine. Clean up the streets with a chainsaw leg, 15+ weapons and your hovercar as you battle the rogue AI Syn, rival bounty hunters and cyberpunks aplenty. Apogee’s most outrageous FPS since Duke Nukem 3D. Good hunting, Sir!
- 10
Quake
Single-player alternative to illWill — playable solo, no multiplayer required. Shares Action with illWill.
Developed by the award-winning id Software, Quake® is the ground-breaking, original dark fantasy first-person shooter that inspires today’s retro-style FPS games. With Quake (Enhanced), experience the authentic, updated, and visually enhanced version of the original.
- 11
Serious Sam 4
Single-player alternative to illWill — playable solo, no multiplayer required. Shares Action and Indie with illWill.
Serious Sam 4 reignites the classic FPS series in a high-powered prequel loaded with an explosive arsenal, intergalactic carnage, and perfectly timed one-liners.
- 12
DOOM
Single-player alternative to illWill — playable solo, no multiplayer required. Shares Action with illWill.
Now includes all three premium DLC packs (Unto the Evil, Hell Followed, and Bloodfall), maps, modes, and weapons, as well as all feature updates including Arcade Mode, Photo Mode, and the latest Update 6.66, which brings further multiplayer improvements as well as revamps multiplayer progression.
- 13
Ion Fury
Single-player alternative to illWill — playable solo, no multiplayer required. Shares Action and Indie with illWill.
3D Realms, creators of Duke Nukem 3D, Prey, and Max Payne, team up with Voidpoint to bring back the legendary Build Engine, famous for classic shooters like Duke Nukem 3D, Shadow Warrior, and Blood. Fast-paced FPS combat across huge, secret-packed levels. Ion Fury is the real deal!
- 14
Slayers X: Terminal Aftermath: Vengance of the Slayer
Single-player alternative to illWill — playable solo, no multiplayer required. Shares Action with illWill.
So.... got what it takes to be a X Slayer?!?... 7 weapons, blood and gore, twisted music by Seepage & Psyko Syndikate, and maps where you can blow up everything. its awesome. started making it in 1998 in high school with my friend and now im 37, so i have life experience now.
- 15
Serious Sam 3: BFE
Single-player alternative to illWill — playable solo, no multiplayer required. Shares Action and Indie with illWill.
Serious Sam 3: BFE is a prequel to the original indie fast action FPS and Game of the Year sensation - Serious Sam: The First Encounter!
- 16
Rabbit Story
Single-player alternative to illWill — playable solo, no multiplayer required. Shares Indie with illWill.
Rabbit Story is an adventure game that offers a unique play experience: simple in controls and appealing to feelings. Its dramatic plot tells the player about relationship breakup and struggles, doubts and fears related to it.