Single-player games like Megaton Rainfall
Below are 8 single-player Steam games similar to Megaton Rainfall, 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 Megaton Rainfall page.
Ranked picks
- 1

Universe Sandbox
Single-player alternative to Megaton Rainfall — playable solo, no multiplayer required. Shares Indie with Megaton Rainfall.
Create & destroy on an unimaginable scale with a realistic physics-based space simulator. Explore the beauty of our universe and the fragility of our planet. Use science to bend the laws of gravity, collide planets, boil away oceans, fire epic space lasers, and customize your universe.
- 2

Superfly
Single-player alternative to Megaton Rainfall — playable solo, no multiplayer required. Shares Action and Indie with Megaton Rainfall.
Superfly is a virtual reality action game where you play as the superhero of your dreams. Mix and match twelve unique movement modes to fly through a massive open-world city full of challenges for your movement and combat skills.
- 3

Airborn
Single-player alternative to Megaton Rainfall — playable solo, no multiplayer required. Shares Action and Indie with Megaton Rainfall.
Soar through the air and decimate their fleet. Fight off a never-ending onslaught of robotic enemies by combining devastating firepower and unparalleled mobility.
- 4

STAR WARS™: Squadrons
Single-player alternative to Megaton Rainfall — playable solo, no multiplayer required. Shares Action with Megaton Rainfall.
Master the art of starfighter combat in the authentic piloting experience STAR WARS™: Squadrons. Feel the adrenaline of first-person multiplayer space dogfights alongside your squadron, and buckle up in a thrilling STAR WARS™ story.
- 5

Saints Row IV: Re-Elected
Single-player alternative to Megaton Rainfall — playable solo, no multiplayer required. Shares Action with Megaton Rainfall.
Experience the insane antics of Saints Row IV. The Saints have gone from the Penthouse to the White House - but Earth has been invaded and it’s up to you to save it with an arsenal of superpowers and strange weapons, in the wildest open world game ever.
- 6

Project Wingman
Single-player alternative to Megaton Rainfall — playable solo, no multiplayer required. Shares Action and Indie with Megaton Rainfall.
Project Wingman is a flight action game that lets you take the seat of advanced fighter jets and become a true ace. Fight in various missions and gamemodes ranging from intense aerial dogfights to large scale ground assault in an alternate scorched earth setting.
- 7

Prototype™
Single-player alternative to Megaton Rainfall — playable solo, no multiplayer required. Shares Action with Megaton Rainfall.
You are the Prototype, Alex Mercer, a man without memory armed with amazing shape-shifting abilities, hunting your way to the heart of the conspiracy which created you; making those responsible pay. Fast & Deadly Shape-Shifting Combat: Reconfigure your body to the situation at hand.
- 8

SPORE™
Single-player alternative to Megaton Rainfall — playable solo, no multiplayer required. Shares Action with Megaton Rainfall.
Be the architect of your own universe with Spore, an exciting single-player adventure. From Single Cell to Galactic God, evolve your creature in a universe of your own creations.