Single-player games like Quantum Protocol
Below are 16 single-player Steam games similar to Quantum Protocol, 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 Quantum Protocol page.
Ranked picks
- 1
Save Humanity.exe
Single-player alternative to Quantum Protocol — playable solo, no multiplayer required. Shares Strategy with Quantum Protocol.
A roguelike deckbuilder based around designing a microchip from a pile of junk circuits to out compute incoming viruses trying to crash your system. Combo hardware with software programs to chain multipliers that overflow your FLOP meter before the glitches overwhelm you.
- 2
Limit Choice
Single-player alternative to Quantum Protocol — playable solo, no multiplayer required. Shares Strategy with Quantum Protocol.
In this game, a wide variety of unique cards will make their appearance, each wielding diverse skills to support your battles. With every confrontation against enemies and overcoming of difficult trials, your deck evolves, gaining ever-increasing power.
- 3
StarVaders
Single-player alternative to Quantum Protocol — playable solo, no multiplayer required. Shares Strategy with Quantum Protocol.
Pilot a powerful mech to fight off the alien invasion in this ULTIMATE fusion of deckbuilding and grid-based tactics. Discover game-breaking combos, rewind time to alter your fate, and protect the future of humanity in this endlessly replayable roguelike.
- 4
Cobalt Core
Single-player alternative to Quantum Protocol — playable solo, no multiplayer required. Shares Strategy with Quantum Protocol.
A sci-fi roguelike deckbuilder with a deep new single-axis spin on tactics games! Dodge missiles, line up your cannons, and blast 'em out of the sky... Then get to the bottom of these time loops, before it's too late!
- 5
Trizon
Single-player alternative to Quantum Protocol — playable solo, no multiplayer required. Shares Strategy with Quantum Protocol.
Trizon is a roguelike deck-building game. Fuse any two cards together to play crazy combos. The game combines auto-battler mechanics, where creatures attack on their own, with instant-effect spell cards. Battles are fast-paced and dynamic, set against a simple and restrained art style.
- 6
Touhou: Lost Branch of Legend
Single-player alternative to Quantum Protocol — playable solo, no multiplayer required. Shares Strategy with Quantum Protocol.
Welcome to Eientei, combine multiple colors of mana to build your ideal deck, duel with gensokyo girls, and chase back the mysterious moon treasure. Also, enjoy the unpredictable Roguelike with fantasy Danmaku!
- 7
魔女黏糊笔记
Single-player alternative to Quantum Protocol — playable solo, no multiplayer required. Shares Strategy with Quantum Protocol.
这是一款结合卡牌与骰子的roguelike游戏，通过卡组构筑，在战斗中拼点尽可能无损耗地击败敌人。 魔女缪可苏带着她的笔记来到了一个魔物洞窟面前，你将在这里遇到各种各样的魔物，以及魔物娘！将她们击败，或是被她们击败吧！
- 8
Cross Blitz
Single-player alternative to Quantum Protocol — playable solo, no multiplayer required. Shares Strategy with Quantum Protocol.
Cross Blitz is a unique RPG deckbuilder featuring fast-paced tactical combat with loads of cards to collect and synergies to wield. Explore, level up, craft new cards and build the perfect decks as you carve your own path to victory!
- 9
Slay the Spire
Single-player alternative to Quantum Protocol — playable solo, no multiplayer required. Shares Strategy with Quantum Protocol.
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!
- 10
Nova Drift
Single-player alternative to Quantum Protocol — playable solo, no multiplayer required.
Nova Drift distills the mechanical depth and strategy of an ARPG into classic arcade space combat. Control an endlessly evolving bio-mechanical ship, face legions of strange and deadly foes, and ride the wake of a dying star across the void.
- 11
CrossCode
Single-player alternative to Quantum Protocol — playable solo, no multiplayer required.
A retro-inspired 2D Action RPG set in the distant future. CrossCode combines 16-bit SNES-style graphics with butter-smooth physics, a fast-paced combat system, and engaging puzzle mechanics, served with a gripping sci-fi story.
- 12
Magic: The Gathering - Duels of the Planeswalkers 2013
Single-player alternative to Quantum Protocol — playable solo, no multiplayer required. Shares Strategy with Quantum Protocol.
Play with friends or AI as you travel across fantastic planes to take on new encounters & opponents. Magic 2013 features ten customizable decks, individual records, new items & more!
- 13
Monster Train
Single-player alternative to Quantum Protocol — playable solo, no multiplayer required. Shares Strategy with Quantum Protocol.
Monster Train is a strategic roguelike deck building game with a twist. Set on a train to hell, you’ll use tactical decision making to defend multiple vertical battlegrounds. With real time competitive multiplayer and endless replayability, Monster Train is always on time.
- 14
Yu-Gi-Oh! Legacy of the Duelist : Link Evolution
Single-player alternative to Quantum Protocol — playable solo, no multiplayer required.
Build your Deck from over 10,000 cards and take on the most iconic Duelists from the Yu-Gi-Oh! universe. Relive the stories from the original Yu-Gi-Oh! animated series through Yu-Gi-Oh! VRAINS!
- 15
Vampire Survivors
Single-player alternative to Quantum Protocol — playable solo, no multiplayer required.
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!
- 16
Zero Strain
Single-player alternative to Quantum Protocol — playable solo, no multiplayer required.
Move, shoot, and dodge in this hyper-fast top-down shooter. Descend into the depths of uncharted dimensions and destroy everything in your path!