Single-player games like Halo: Spartan Assault
Below are 16 single-player Steam games similar to Halo: Spartan Assault, 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 Halo: Spartan Assault page.
Ranked picks
- 1
Halo: Spartan Strike
Single-player alternative to Halo: Spartan Assault — playable solo, no multiplayer required. Shares Action with Halo: Spartan Assault.
Halo: Spartan Strike makes you a Spartan supersoldier battling evil forces. Delve into 30 challenging missions through cities and jungles using a devastating arsenal of weapons, abilities and vehicles including the iconic Warthog against the Covenant and Promethean enemies. *DirectX feature level 10 required*
- 2
GUNPIG: Firepower For Hire
Single-player alternative to Halo: Spartan Assault — playable solo, no multiplayer required. Shares Action with Halo: Spartan Assault.
Sci-fi top-down twin-stick shooter with 9 weapons, 3 alts and secret hidden collectibles!
- 3
Alien Breed 3: Descent
Single-player alternative to Halo: Spartan Assault — playable solo, no multiplayer required. Shares Action with Halo: Spartan Assault.
Experience the final explosive chapter in the Alien Breed series and uncover the horrifying truth surrounding the existence of the Breed. Launch discount good thru Nov. 24 10am PST.
- 4
Alien Breed 2: Assault
Single-player alternative to Halo: Spartan Assault — playable solo, no multiplayer required. Shares Action with Halo: Spartan Assault.
Can you survive the alien onslaught? Gamers across the world will now have a chance to play the next chapter in this high-budget, high-quality series.
- 5
Exterminators of Saturn
Single-player alternative to Halo: Spartan Assault — playable solo, no multiplayer required. Shares Action with Halo: Spartan Assault.
A top down, twin stick shooter inspired by classic retro arcade games with loads of enemies, fast paced bullet hell combat, big boss battles and tons of bullets.
- 6
Lonefield Evacutation Survivor
Single-player alternative to Halo: Spartan Assault — playable solo, no multiplayer required. Shares Action with Halo: Spartan Assault.
Lonefield Evacuation Survivor is a... survivor in which you play as a ship facing an alien incursion. Destroy your enemies, collect bolts and upgrade your ship to survive long enough and escape. Play alone or with up to 3 friends in local multiplayer or with Remote Play Together for online gaming.
- 7
Alien Breed: Impact
Single-player alternative to Halo: Spartan Assault — playable solo, no multiplayer required. Shares Action with Halo: Spartan Assault.
Experience the explosive science fiction arcade-shooter that resurrects a much revered franchise in an epic single player and co-op multiplayer campaign.
- 8
Cyber Avenger
Single-player alternative to Halo: Spartan Assault — playable solo, no multiplayer required. Shares Action with Halo: Spartan Assault.
Cyber Avenger is a top-down action game where you take on the role of a highly skilled covert operative on a dangerous mission to stop a group of terrorists. You must navigate through five maps, facing a variety of enemies, including shotgunners, snipers, melee fighters, kamikazes, and more.
- 9
Killing Floor
Single-player alternative to Halo: Spartan Assault — playable solo, no multiplayer required. Shares Action with Halo: Spartan Assault.
6-player co-op survival horror at its finest! Free updates, free special events and a ridiculous amount of fun!
- 10
Call of Duty®
Single-player alternative to Halo: Spartan Assault — playable solo, no multiplayer required. Shares Action with Halo: Spartan Assault.
The Call of Duty® experience supports Call of Duty®: Black Ops 7, Call of Duty®: Black Ops 6, and Call of Duty®: Warzone™.
- 11
Dungeon Defenders
Single-player alternative to Halo: Spartan Assault — playable solo, no multiplayer required. Shares Action with Halo: Spartan Assault.
Create a hero from one of four classes to save Etheria in this 4-player coop Tower Defense Action-RPG. Includes Steam exclusive Portal gun & TF2 familiars!
- 12
Sanctum
Single-player alternative to Halo: Spartan Assault — playable solo, no multiplayer required. Shares Action with Halo: Spartan Assault.
You think Tower Defense games are all about building? You thought wrong. Sanctum is not your average Tower Defense title. When the havoc starts, you get to join the fray! As one of the world’s first First Person Shooter - Tower Defense games, Sanctum has taken the best of both worlds to deliver an epic, one-of-a-kind experience.
- 13
TowerFall Ascension
Single-player alternative to Halo: Spartan Assault — playable solo, no multiplayer required. Shares Action with Halo: Spartan Assault.
TowerFall Ascension is the definitive version of the hit archery combat game. Inspired by classics from the golden age of couch multiplayer, it's a 4-player local party game centering around hilarious, intense versus matches. The core mechanics are simple and accessible, but hard to master and combat is fierce.
- 14
Halo: The Master Chief Collection
Single-player alternative to Halo: Spartan Assault — playable solo, no multiplayer required. Shares Action with Halo: Spartan Assault.
The Master Chief’s iconic journey includes six games, built for PC and collected in a single integrated experience. Whether you’re a long-time fan or meeting Spartan 117 for the first time, The Master Chief Collection is the definitive Halo gaming experience.
- 15
Greed Corp
Single-player alternative to Halo: Spartan Assault — playable solo, no multiplayer required.
Turn-based strategy at its finest.
- 16
Gatling Gears
Single-player alternative to Halo: Spartan Assault — playable solo, no multiplayer required. Shares Action with Halo: Spartan Assault.
When the Empire begins its reign of destruction in a thirst for natural resources, it’s up to Max Brawley, a retired Gatling Gear pilot, to stop them.