IMHO.

Games like String Theory

If String Theory is your kind of game, the closest matches are MULTIVERSAL TIME SURVIVORS, Realm of oblivion(soul like) and Mulite Sword Man — picked from the ranked list below. Each pick is ranked by what players of this game also play, shared genres and tags, and review-mined similarity — not a generic popularity list.

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About String Theory: This is a music game where players can practice rhythm skills. Players will practice some basic music structures, and the music will be transformed into attack skills to defeat different enemies.

2025ActionStrategyIndieSimulationRPGCasual13.99 USDWindowsby ZHANGHAILONG
String Theory — Steam game cover

Players who liked String Theory also play

Steam players who put hours into String Theory also tend to own these titles — a signal called collaborative filtering. imho.run cross-references millions of library ownership patterns to surface games whose real audiences overlap, regardless of whether their genre tags match.

  1. MULTIVERSAL TIME SURVIVORS

    WHY THIS

    Top pick for String Theory fans by collaborative filtering across millions of Steam libraries. Shares Action and Strategy with String Theory.

    Classic Spin on Survivors Genre. Choose one among many characters and Travel though multimple dimensions battling foes.

    2024ActionStrategyAdventure3.99 USDSteam ↗
  2. Realm of oblivion(soul like)

    WHY THIS

    Second-strongest match for String Theory fans by collaborative filtering across millions of Steam libraries. Shares Action and Indie with String Theory.

    《BLACK MYTH SHIKONG》is an action game similar to the Galactic Castlevania.Players will take on the role of a somewhat mediocre and decadent young girl, battling the Devourer in a vast world that combines magic and modern civilization.

    2024ActionIndieAdventure6.99 USDSteam ↗
  3. Mulite Sword Man

    WHY THIS

    Third-strongest match for String Theory fans by collaborative filtering across millions of Steam libraries. Shares Action and Strategy with String Theory.

    MULITE is a light action role-playing game that focuses on the collocating of operation and gameplay. The game provides a lot of equipment and skills. Based on the retro action role-playing game mechanism and combined with the Rogue-lite elements, this game abandons the traditional RPG lengthy dialogues and boring tasks, enabling players...

    2019ActionStrategyIndie3.99 USDSteam ↗
  4. TORINTO

    WHY THIS

    Ranked #4 for String Theory fans by collaborative filtering across millions of Steam libraries. Shares Action and Strategy with String Theory.

    TORINTO is a run ‘n’ gun game with a medieval twist. Blades take the place of bullets as the heroes traverse side-scrolling stages, from forests and fields to castle walls, quelling the heartless fiends that now roam the land.

    2019ActionStrategyIndie4.99 USDSteam ↗
  5. BOXPAST LOV3YOU

    WHY THIS

    Ranked #5 for String Theory fans by collaborative filtering across millions of Steam libraries. Shares Action and Indie with String Theory.

    Play as a PC and destroy viruses!

    2026ActionIndieAdventure12.00 USDSteam ↗
  6. ICEY

    WHY THIS

    Ranked #6 for String Theory fans by collaborative filtering across millions of Steam libraries. Shares Action and RPG with String Theory.

    ICEY is a 2D side-scrolling action game and a META game in disguise. As you follow the narrator's omnipresent voice, you will see through ICEY's eyes and learn the truth about her world. The narrator will constantly urge you in one direction, but you must ask, "Why? Why am I following his directions?“ Obey? Rebel?

    2016ActionAdventureRPG3.84 USDDeck VerifiedSteam ↗
  7. Crazy Flasher 7 Mercenary Empire(stand-alone Version)

    WHY THIS

    Ranked #7 for String Theory fans by collaborative filtering across millions of Steam libraries. Shares Action and Indie with String Theory.

    The classic old web game action role-playing in 2010, fighting zombies in the last days, horizontal 2D games, firearms, cold weapons, mercenaries, gangs... Now a stand-alone version without internet is launched.

    2023ActionIndieAdventure3.99 USDDeck PlayableSteam ↗
  8. Abyss Odyssey

    WHY THIS

    Ranked #8 for String Theory fans by collaborative filtering across millions of Steam libraries. Shares Action and Indie with String Theory.

    From indie Chilean developer ACE Team comes a new side-scrolling action adventure game featuring a complex fighting engine in procedurally generated levels that destines its three warriors to battle a different abyss each time! Choose your hero and also learn to possess your enemies in the abyss…

    2014ActionIndieAdventure4.49 USDDeck VerifiedSteam ↗

Cheaper alternatives

Games in the same vein priced at least 40% below String Theory at current Steam store prices.

  1. Garry's Mod

    WHY THIS

    Priced ~64% under String Theory on Steam right now. Shares Indie and Simulation with String Theory.

    Garry's Mod is a physics sandbox. There aren't any predefined aims or goals. We give you the tools and leave you to play.

    2006IndieSimulationCasual4.99 USDDeck PlayableSteam ↗
  2. Vampire Survivors

    WHY THIS

    Priced ~64% under String Theory on Steam right now. Shares Action and Indie with String Theory.

    Mow down thousands of night creatures and survive until dawn! Vampire Survivors is a gothic horror casual game with rogue-lite elements, where your choices can allow you to quickly snowball against the hundreds of monsters that get thrown at you. Be the bullet hell!

    2022ActionIndieRPG4.99 USDDeck VerifiedSteam ↗
  3. R.E.P.O.

    WHY THIS

    Priced ~50% under String Theory on Steam right now. Shares Action with String Theory.

    An online co-op horror game with up to 6 players. Locate valuable, fully physics-based objects and handle them with care as you retrieve and extract to satisfy your creator's desires.

    2025ActionEarly Access6.99 USDDeck PlayableSteam ↗
  4. PEAK

    WHY THIS

    Priced ~43% under String Theory on Steam right now. Shares Action and Indie with String Theory.

    PEAK is a co-op climbing game where the slightest mistake can spell your doom. Either solo or as a group of lost nature scouts, your only hope of rescue from a mysterious island is to scale the mountain at its center. Do you have what it takes to reach the PEAK?

    2025ActionIndieAdventure7.99 USDDeck VerifiedSteam ↗
  5. Titanfall® 2

    WHY THIS

    Priced ~68% under String Theory on Steam right now. Shares Action with String Theory.

    Respawn Entertainment gives you the most advanced titan technology in its new, single player campaign & multiplayer experience. Combine & conquer with new titans & pilots, deadlier weapons, & customization and progression systems that help you and your titan flow as one unstoppable killing force.

    2020Action4.49 USDDeck PlayableSteam ↗
  6. Sid Meier's Civilization® V

    WHY THIS

    Priced ~46% under String Theory on Steam right now. Shares Strategy with String Theory.

    Create, discover, and download new player-created maps, scenarios, interfaces, and more!

    2010Strategy7.49 USDDeck PlayableSteam ↗
  7. Slay the Spire

    WHY THIS

    Priced ~55% under String Theory on Steam right now. Shares Strategy and Indie with String Theory.

    We fused card games and roguelikes together to make the best single player deckbuilder we could. Craft a unique deck, encounter bizarre creatures, discover relics of immense power, and Slay the Spire!

    2019StrategyIndie6.24 USDDeck VerifiedSteam ↗
  8. Inscryption

    WHY THIS

    Priced ~43% under String Theory on Steam right now. Shares Strategy and Indie with String Theory.

    Inscryption is an inky black card-based odyssey that blends the deckbuilding roguelike, escape-room style puzzles, and psychological horror into a blood-laced smoothie. Darker still are the secrets inscrybed upon the cards...

    2021StrategyIndieAdventure7.99 USDDeck PlayableSteam ↗

Free alternatives

Free-to-play games that recommended players of this title also tend to enjoy.

  1. Bongo Cat

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Indie and Simulation with String Theory.

    Bongo cat needs your help. Bongo cat needz more hatz!!! Every time you press a key, Bongo cat will punch your taskbar. Type, click, play, work to collect more points. Which hats will you find?

    2025IndieSimulationMassively MultiplayerFreeDeck PlayableSteam ↗
  2. Indigo Park: Chapter 1

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action and Indie with String Theory.

    Explore the abandoned childhood wonder of Indigo Park! Guided by Rambley the Raccoon, help restore power to the destroyed amusement park while you run from the reason it shut down.

    2024ActionIndieAdventureFreeDeck PlayableSteam ↗
  3. STRAFTAT

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action with String Theory.

    STRAFTAT is a 1v1/2v2 ONLINE first person SHOOTER with quick rounds in over 350 MAPS ; Including all WEAPONS, proximity chat and 4 players FFA.

    2024ActionFreeDeck PlayableSteam ↗
  4. The Looker

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Indie with String Theory.

    You wake up, alone, on a strangely familiar island full of puzzles that will frustrate and annoy you.

    2022IndieFreeDeck PlayableSteam ↗
  5. missed messages.

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Indie and Simulation with String Theory.

    ‘goth gf’s iPhone’ airdrops you - accept or decline? A love/horror story about life, death, & memes.

    2019IndieSimulationFree To PlayFreeDeck PlayableSteam ↗
  6. Virtual Cottage

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Indie and Simulation with String Theory.

    Virtual Cottage gives you a comfy place to rest and be productive without any distractions. Open the game, set yourself a goal and enjoy the atmosphere.

    2020IndieSimulationFree To PlayFreeDeck PlayableSteam ↗
  7. Iron Snout

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action and Indie with String Theory.

    Iron Snout is a fast, colorful and brutal fighting game in which you will be helping a piglet fight for its life against hordes of wolves.

    2016ActionIndieFree To PlayFreeDeck PlayableSteam ↗
  8. UNBEATABLE [white label]

    WHY THIS

    Free-to-play pick from the same recommendation pool — no purchase to try it. Shares Action and Indie with String Theory.

    A young girl learns a song. An exclusive side-story set in the world of D-CELL GAMES' upcoming rhythm-adventure.

    2021ActionIndieAdventureFreeDeck PlayableSteam ↗

Frequently asked about String Theory

How much does String Theory cost?
String Theory is listed on Steam at 13.99 USD (current store price; Steam sales may reduce this temporarily).
What games are most similar to String Theory?
Based on Steam play patterns and shared genres/tags, the games most often recommended alongside String Theory are MULTIVERSAL TIME SURVIVORS, Realm of oblivion(soul like), Mulite Sword Man.
Who developed String Theory?
String Theory was developed by ZHANGHAILONG and published by Zhanghailong.

imho.run ranks Steam game alternatives using a mix of collaborative filtering (ALS / iALS / EASE / LightGCN), content scoring over genres, categories, Steam tags, developers, and publishers, plus AI-extracted vibes mined from review text. The page above is generated in seed mode anchored on String Theory.

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