Single-player games like Kaiju Ace
Below are 14 single-player Steam games similar to Kaiju Ace, 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 Kaiju Ace page.
Ranked picks
- 1

Green Hell
Single-player alternative to Kaiju Ace — playable solo, no multiplayer required. Shares Action and Simulation with Kaiju Ace.
Plunge into the open-world survival simulation set in the extreme conditions of the uncharted Amazon jungle. Use real-life survival techniques to craft, hunt, fight, and gather resources, set a makeshift shelter, or raise a fortress. Survive alone or team up with your friends and challenge the jungle together.
- 2

IL-2 Sturmovik: Battle of Stalingrad
Single-player alternative to Kaiju Ace — playable solo, no multiplayer required. Shares Action and Simulation with Kaiju Ace.
IL-2 Sturmovik: Battle of Stalingrad is the continuation of the legendary IL-2 Sturmovik series that has set the standard for PC combat flight games for more than ten years. This new entry into the series will offer virtual pilots an even more accurate simulation of the most famous air battles.
- 3

Satisfactory
Single-player alternative to Kaiju Ace — playable solo, no multiplayer required. Shares Simulation with Kaiju Ace.
Satisfactory is a first-person open-world factory building game with a dash of exploration and combat. Play alone or with friends, explore an alien planet, create multi-story factories, and enter conveyor belt heaven!
- 4

Factorio
Single-player alternative to Kaiju Ace — playable solo, no multiplayer required. Shares Simulation with Kaiju Ace.
Factorio is a game about building and creating automated factories to produce items of increasing complexity, within an infinite 2D world. Use your imagination to design your factory, combine simple elements into ingenious structures, and finally protect it from the creatures who don't really like you.
- 5

Euro Truck Simulator 2
Single-player alternative to Kaiju Ace — playable solo, no multiplayer required. Shares Simulation with Kaiju Ace.
Travel across Europe as king of the road, a trucker who delivers important cargo across impressive distances! With dozens of cities to explore, your endurance, skill and speed will all be pushed to their limits.
- 6

American Truck Simulator
Single-player alternative to Kaiju Ace — playable solo, no multiplayer required. Shares Simulation with Kaiju Ace.
Experience legendary American trucks and deliver various cargoes across sunny California, sandy Nevada, and the Grand Canyon State of Arizona. American Truck Simulator takes you on a journey through the breathtaking landscapes and widely recognized landmarks around the States.
- 7

Driftland: The Magic Revival
Single-player alternative to Kaiju Ace — playable solo, no multiplayer required. Shares Simulation with Kaiju Ace.
After a devastating war between ancient mages, a powerful spell is all that holds together the shattered planet of Driftland. Take on the role of a powerful mage capable of moving and connecting floating lands, develop a mighty empire, and restore Driftland to its former glory!
- 8

Borderlands 4
Single-player alternative to Kaiju Ace — playable solo, no multiplayer required. Shares Action with Kaiju Ace.
Borderlands 4 is a mayhem-fueled looter shooter, jam-packed with billions of weapons, deadly enemies, and intense co-op action. Break free from a dangerous hidden planet as one of four new badass Vault Hunters.
- 9

Choo Choo Survivor
Single-player alternative to Kaiju Ace — playable solo, no multiplayer required. Shares Action and Simulation with Kaiju Ace.
Drive your train to safety while shooting down endless hordes of zombies blocking your way. Upgrade your weapons and abilities and become absurdly powerful!
- 10

Gamer To Game Developer Series 1: More Than a Gamer
Single-player alternative to Kaiju Ace — playable solo, no multiplayer required.
Welcome to the new GTGD S1, a Unity 2017 multiplayer tutorial for game developers. This training course is of intermediate difficulty so you should first be familiar with the basics of coding in Unity. This tutorial will teach you the key elements of the Unity 2017 multiplayer system.
- 11

Guild Commander
Single-player alternative to Kaiju Ace — playable solo, no multiplayer required. Shares Simulation with Kaiju Ace.
In Guild Commander you manage your guild to victory! Deploy your guild members and save your world from the Necro Lord!
- 12

Weekend Drive
Single-player alternative to Kaiju Ace — playable solo, no multiplayer required. Shares Action with Kaiju Ace.
Giants, zombies, aliens, dinosaurs, a fully destructible city with fun vehicles (including helicopter!) and weapons at your disposable, yes Weekend Drive is way ahead of the curve! Get set for a fun unique full on action first person shooter experience!
- 13

Model City
Single-player alternative to Kaiju Ace — playable solo, no multiplayer required. Shares Simulation with Kaiju Ace.
Welcome to Model City, a calm relaxing small game where you can't lose or do anything wrong.
- 14

Home By The River
Single-player alternative to Kaiju Ace — playable solo, no multiplayer required. Shares Simulation with Kaiju Ace.
This is a resource gathering, crafting RPG, where you build your home from scratch and make whatever design you want. You start with a dead polluted land that you transform into a beautiful homestead by a river. Play single player or LAN Co-op.