Single-player games like Serious Sam Fusion 2017 (beta)
Below are 16 single-player Steam games similar to Serious Sam Fusion 2017 (beta), 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 Serious Sam Fusion 2017 (beta) page.
Ranked picks
- 1

Serious Sam 3: BFE
Single-player alternative to Serious Sam Fusion 2017 (beta) — playable solo, no multiplayer required. Shares Action and Indie with Serious Sam Fusion 2017 (beta).
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!
- 2

Serious Sam HD: The First Encounter
Single-player alternative to Serious Sam Fusion 2017 (beta) — playable solo, no multiplayer required. Shares Action and Indie with Serious Sam Fusion 2017 (beta).
Serious Sam HD: The First Encounter is a visually upgraded and fully Steam supported remake version of the original high-adrenaline single-play and 16-player co-operative arcade-action FPS which was Gamespot's Game of the Year 2001 and which scored overall of 87% on Metacritic!
- 3

Blood: Refreshed Supply™
Single-player alternative to Serious Sam Fusion 2017 (beta) — playable solo, no multiplayer required. Shares Action with Serious Sam Fusion 2017 (beta).
Things are about to get… bloody! Soak up 42 pulse-pounding levels dripping with Lovecraftian atmosphere as you battle your way through armies of sycophantic cultists, zombies, gargoyles, hell hounds, and other insatiable horrors, in your quest to defeat the loathsome Tchernobog.
- 4

Quake
Single-player alternative to Serious Sam Fusion 2017 (beta) — playable solo, no multiplayer required. Shares Action with Serious Sam Fusion 2017 (beta).
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.
- 5

Gunheart
Single-player alternative to Serious Sam Fusion 2017 (beta) — playable solo, no multiplayer required. Shares Action and Indie with Serious Sam Fusion 2017 (beta).
Gunheart is an online co-op RPG shooter where you and your friends become customizable robotic bounty hunters trying to make a buck at the edge of the galaxy. Encounter menacing aliens, explore exotic locations, unlock new gear, and rake in cash to boost your rig.
- 6

EARTH DEFENSE FORCE 6
Single-player alternative to Serious Sam Fusion 2017 (beta) — playable solo, no multiplayer required. Shares Action with Serious Sam Fusion 2017 (beta).
Live the future of despair.The year is 2024 AD. The survivors fought against the remaining threats while trying their best to continue their recovery.Three years passed in the year 2027. In a new world without hope, the time has come to once again resist the fate of the Earth.
- 7

Battlezone: Combat Commander
Single-player alternative to Serious Sam Fusion 2017 (beta) — playable solo, no multiplayer required. Shares Action with Serious Sam Fusion 2017 (beta).
Battlezone: Combat Commander remasters FPS-RTS classic Battlezone II with slick new visuals, brand new achievements, Steam Workshop support and much more! The solar system is at war. Take command.
- 8

DOOM + DOOM II
Single-player alternative to Serious Sam Fusion 2017 (beta) — playable solo, no multiplayer required. Shares Action with Serious Sam Fusion 2017 (beta).
Developed by id Software, and originally released in 1993 and 1994, the definitive, newly enhanced versions of DOOM + DOOM II are available as a combined product.
- 9

Serious Sam HD: The Second Encounter
Single-player alternative to Serious Sam Fusion 2017 (beta) — playable solo, no multiplayer required. Shares Action and Indie with Serious Sam Fusion 2017 (beta).
Serious Sam HD: The Second Encounter is a visually upgraded and fully Steam supported remake of the original high-adrenaline single-play and 16-player co-operative arcade-action FPS and Gamespot's Game of the Month!
- 10

Serious Sam II
Single-player alternative to Serious Sam Fusion 2017 (beta) — playable solo, no multiplayer required. Shares Action and Indie with Serious Sam Fusion 2017 (beta).
Serious Sam II is a shot of adrenaline to the hearts of first-person shooter fans across the world. This is serious!
- 11

Call of Duty®: Modern Warfare® 2 (2009)
Single-player alternative to Serious Sam Fusion 2017 (beta) — playable solo, no multiplayer required. Shares Action with Serious Sam Fusion 2017 (beta).
The most-anticipated game of the year and the sequel to the best-selling first-person action game of all time, Modern Warfare 2 continues the gripping and heart-racing action as players face off against a new threat dedicated to bringing the world to the brink of collapse.
- 12

The Talos Principle
Single-player alternative to Serious Sam Fusion 2017 (beta) — playable solo, no multiplayer required. Shares Action and Indie with Serious Sam Fusion 2017 (beta).
The Talos Principle is a first-person puzzle game in the tradition of philosophical science fiction. Made by Croteam and written by Tom Jubert (FTL, The Swapper) and Jonas Kyratzes (The Sea Will Claim Everything).
- 13

Serious Sam 4
Single-player alternative to Serious Sam Fusion 2017 (beta) — playable solo, no multiplayer required. Shares Action and Indie with Serious Sam Fusion 2017 (beta).
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.
- 14

The Talos Principle 2
Single-player alternative to Serious Sam Fusion 2017 (beta) — playable solo, no multiplayer required. Shares Action with Serious Sam Fusion 2017 (beta).
The Talos Principle 2 is a thought-provoking first-person puzzle experience that greatly expands on the first game's philosophical themes and stunning environments with increasingly mind-bending challenges.
- 15

Serious Sam: Siberian Mayhem
Single-player alternative to Serious Sam Fusion 2017 (beta) — playable solo, no multiplayer required. Shares Action with Serious Sam Fusion 2017 (beta).
Serious Sam: Siberian Mayhem is a new stand-alone expansion to the world of the classic FPS series. Join the fight against Notorious Mental on a journey through the wild lands of Russia, and find your way through this lost chapter of Sam Stone's adventures.
- 16

Serious Sam Classics: Revolution
Single-player alternative to Serious Sam Fusion 2017 (beta) — playable solo, no multiplayer required. Shares Action and Indie with Serious Sam Fusion 2017 (beta).
Serious Sam is a high-adrenaline arcade-action shooter heavily focused on frantic action. In a world where cyberpunk meets fantasy-fiction and advanced technology is mixed with black magic and psycho-powers, Sam travels through four beautiful worlds, confronting countless foes on his way to Mental's base.