Single-player games like Mad Combat Marines
Below are 12 single-player Steam games similar to Mad Combat Marines, 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 Mad Combat Marines page.
Ranked picks
- 1

Masked Shooters
Single-player alternative to Mad Combat Marines — playable solo, no multiplayer required. Shares Action and Indie with Mad Combat Marines.
Masked Shooters features covert operational soldiers who are armed with advanced weaponry.
- 2

Gas Guzzlers: Combat Carnage
Single-player alternative to Mad Combat Marines — playable solo, no multiplayer required. Shares Action with Mad Combat Marines.
Gas Guzzlers: Combat Carnage is a fast-paced addictive combat racing game for the PC. The game features many different vehicles, weapons, upgrades, on-track bonuses as well as distinctive and astonishing environments.
- 3

Monday Night Combat
Single-player alternative to Mad Combat Marines — playable solo, no multiplayer required. Shares Action and Indie with Mad Combat Marines.
Monday Night Combat is a class-based, third-person shooter… and the most popular lethal sport of the future!
- 4

Grand Theft Auto III
Single-player alternative to Mad Combat Marines — playable solo, no multiplayer required. Shares Action with Mad Combat Marines.
Welcome to Liberty City. Where it all began. With stellar voice acting, a darkly comic storyline, a stunning soundtrack and revolutionary open-world gameplay, Grand Theft Auto III is the game that defined the open world genre for a generation.
- 5

Madballs in Babo:Invasion
Single-player alternative to Mad Combat Marines — playable solo, no multiplayer required. Shares Action and Indie with Mad Combat Marines.
Now with cross-platform multiplayer! PC vs. Mac at last.
- 6

GRIP: Combat Racing
Single-player alternative to Mad Combat Marines — playable solo, no multiplayer required. Shares Action and Indie with Mad Combat Marines.
Harness gravity-defying speed in classic combat racing taken to the EXTREME. Master wall-riding, ceiling-surfing tracks, and unleash devastating weapons across 29 blistering circuits. Race solo, split-screen, or online with up to 10 players. GRIP delivers white-knuckle racing like nothing else.
- 7

FlatOut 2
Single-player alternative to Mad Combat Marines — playable solo, no multiplayer required.
Experience the drive of your life as you throw yourself around on and off the track causing fences to shatter, tyre walls explode, water tanks and barrels fly across the track into other cars.
- 8

Zombie Army Trilogy
Single-player alternative to Mad Combat Marines — playable solo, no multiplayer required. Shares Action with Mad Combat Marines.
The cult horror shooter series comes to an apocalyptic conclusion with an epic new third chapter, a heart-pumping new horde mode, and remastered editions of the best-selling Nazi Zombie Army 1 & 2.
- 9

Masked Shooters 2
Single-player alternative to Mad Combat Marines — playable solo, no multiplayer required. Shares Action and Indie with Mad Combat Marines.
Masked Shooters 2 puts you on the front line of a dangerous gunfight that can only end in victory or defeat; there will be no white flags to wave. As a covert ops soldier, you have access to advanced weapons that will blow your enemies away, if you know how to use them.
- 10

Masked Forces
Single-player alternative to Mad Combat Marines — playable solo, no multiplayer required. Shares Action and Indie with Mad Combat Marines.
Masked Forces is an action-packed game where your main purpose is to eliminate your enemies using any means necessary. You have a great singleplayer campaign and multiple online game modes that you can use to show your might.
- 11

Masked Forces: Zombie Survival
Single-player alternative to Mad Combat Marines — playable solo, no multiplayer required. Shares Action and Indie with Mad Combat Marines.
What will you do when the zombie apocalypse comes, are you ready to tackle it right now and stay face to face with all the horrors that will appear?
- 12

King's Guard TD
Single-player alternative to Mad Combat Marines — playable solo, no multiplayer required. Shares Indie and Casual with Mad Combat Marines.
Your Highness, our kingdom is at risk. We’re facing great danger! Not only villagers, but also maidens, warriors, mages, ravens, bats, eagles and dragons are trying to destroy our empire. Guard your throne and stop them now!