Single-player games like Rule No. 2
Below are 9 single-player Steam games similar to Rule No. 2, 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 Rule No. 2 page.
Ranked picks
- 1

Rule No. 1
Single-player alternative to Rule No. 2 — playable solo, no multiplayer required. Shares Action and Indie with Rule No. 2.
A silky smooth Arena First Person Shooter with a prime focus on game-feel. Massacre waves of sentient metallic geometry and their monster compatriots as you fight for your Hi-Score! Designed to be the ultimate 'warm-up' or 'waiting-for-download' game!
- 2

Ion Fury
Single-player alternative to Rule No. 2 — playable solo, no multiplayer required. Shares Action and Indie with Rule No. 2.
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!
- 3

MULLET MADJACK
Single-player alternative to Rule No. 2 — playable solo, no multiplayer required. Shares Action and Indie with Rule No. 2.
MULLET MADJACK is a HIGH-OCTANE-ACTION SHOOTER that put you directly inside a CLASSIC ANIME. Pick your favorite weapon and reach the last floor; Beat your best time or try again. Haste makes waste… OF YOUR ENEMIES!
- 4

AMID EVIL
Single-player alternative to Rule No. 2 — playable solo, no multiplayer required. Shares Action and Indie with Rule No. 2.
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.
- 5

Devil Daggers
Single-player alternative to Rule No. 2 — playable solo, no multiplayer required. Shares Action and Indie with Rule No. 2.
Devil Daggers is a fast-paced shooter that places you in an abyssal arena to face endless legions of demons. Armed with versatile magic daggers and a fluid movement system, fight to survive as long as you can.
- 6

Blood™ Fresh Supply
Single-player alternative to Rule No. 2 — playable solo, no multiplayer required. Shares Action with Rule No. 2.
Battle an army of sycophantic cultists, zombies, gargoyles, hellhounds, and an insatiable host of horrors in your quest to defeat the evil Tchernobog. Squirm through 42 loathesome levels filled with more atmosphere than a Lovecraftian mausoleum.
- 7

Rise of the Triad
Single-player alternative to Rule No. 2 — playable solo, no multiplayer required. Shares Action with Rule No. 2.
Apogee Software and Interceptor Entertainment proudly present the rebirth of the cult-classic first-person shooter, “Rise of the Triad”. Bigger, better and more ludicrous than ever before.
- 8

WRATH: Aeon of Ruin
Single-player alternative to Rule No. 2 — playable solo, no multiplayer required. Shares Action with Rule No. 2.
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.
- 9

Rule No. 3 Downpour
Single-player alternative to Rule No. 2 — playable solo, no multiplayer required. Shares Action and Indie with Rule No. 2.
An arcade arena-shooter FPS about slipping into the flow-state and getting directly to the action as fast as humanly possible. Get overwhelmed by enemies and compete with your friends for hi-scores!