Single-player games like Mr. Sun's Hatbox
Below are 21 single-player Steam games similar to Mr. Sun's Hatbox, 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 Mr. Sun's Hatbox page.
Ranked picks
- 1
Signal Decay
Single-player alternative to Mr. Sun's Hatbox — playable solo, no multiplayer required. Shares Action and Indie with Mr. Sun's Hatbox.
Assemble a cyber agent team to infiltrate procedurally-generated bases in this co-op stealth roguelike adventure. Master highly tactical combat, a cache of cyber weaponry, and teamwork to save humanity from mind-control.
- 2
Stimuli
Single-player alternative to Mr. Sun's Hatbox — playable solo, no multiplayer required. Shares Action and Indie with Mr. Sun's Hatbox.
Stimuli is a Sci-Fi Action Platformer where you are a test subject trapped in a mysterious laboratory and must escape! With a new mechanic added every level, a challenging combat system, and well hidden Easter Eggs, the game delivers fast paced adventure in a sleek indie style!
- 3
Patch Quest
Single-player alternative to Mr. Sun's Hatbox — playable solo, no multiplayer required. Shares Action and Indie with Mr. Sun's Hatbox.
In a labyrinth surrounded by vicious monsters, Explorers must rely on their Lasso to survive! Capture and tame ANY monster to leap, glide, surf, tunnel and websling through a treacherous, patchwork maze. This roguelike/metroidvania seems cute, but it’s a deceptively difficult bullet-hell challenge!
- 4
Regulators
Single-player alternative to Mr. Sun's Hatbox — playable solo, no multiplayer required. Shares Action and Indie with Mr. Sun's Hatbox.
Regulators is a tactical top-down shooter where you lead a team of mercenaries to clear the city from mutating villains using your weapons, gadgets, special super powers and intelligence.
- 5
Streets of Rogue
Single-player alternative to Mr. Sun's Hatbox — playable solo, no multiplayer required. Shares Action and Indie with Mr. Sun's Hatbox.
Fight, sneak, and hack your way through randomly generated cities. It's like Nuclear Throne meets Deus Ex, mixed with the anarchy of GTA. Rogue-lite meets immersive sim, and goes completely insane.
- 6
20XX
Single-player alternative to Mr. Sun's Hatbox — playable solo, no multiplayer required. Shares Action and Indie with Mr. Sun's Hatbox.
20XX is a roguelike action platformer that you can play with a friend. Jump and shoot your way through ever-changing levels, collect awesome new powers, and battle mighty bosses in the name of saving the human race maybe!
- 7
Card Hog
Single-player alternative to Mr. Sun's Hatbox — playable solo, no multiplayer required. Shares Indie with Mr. Sun's Hatbox.
Card Hog is a pig-based dungeon crawler with roguelike and deck building elements. Take the role of an adventurous hog and interact with more than 100 cards of dangerous enemies, powerful weapons and exciting spells!
- 8
Wuppo: Definitive Edition
Single-player alternative to Mr. Sun's Hatbox — playable solo, no multiplayer required. Shares Action and Indie with Mr. Sun's Hatbox.
Play as an exiled 'wum' looking for a new home in this bizarre but charming world, filled with strange creatures, puzzles, monsters and political chaos.
- 9
The Swindle
Single-player alternative to Mr. Sun's Hatbox — playable solo, no multiplayer required. Shares Action and Indie with Mr. Sun's Hatbox.
The Swindle is a steampunk cybercrime caper about breaking into buildings, hacking their systems, stealing all their cash, and quickly running away again before the police show up.
- 10
Spelunky
Single-player alternative to Mr. Sun's Hatbox — playable solo, no multiplayer required. Shares Indie with Mr. Sun's Hatbox.
Spelunky is a unique platformer with randomized levels that offer a challenging new experience each time you play. Journey deep underground and explore fantastic places filled with all manner of monsters, traps, and treasure.
- 11
Darkest Dungeon®
Single-player alternative to Mr. Sun's Hatbox — playable solo, no multiplayer required. Shares Indie with Mr. Sun's Hatbox.
Darkest Dungeon is a challenging gothic roguelike turn-based RPG about the psychological stresses of adventuring. Recruit, train, and lead a team of flawed heroes against unimaginable horrors, stress, disease, and the ever-encroaching dark. Can you keep your heroes together when all hope is lost?
- 12
XCOM® 2
Single-player alternative to Mr. Sun's Hatbox — playable solo, no multiplayer required.
XCOM 2 is the sequel to XCOM: Enemy Unknown, the 2012 award-winning strategy game of the year. Earth has changed and is now under alien rule. Facing impossible odds you must rebuild XCOM, and ignite a global resistance to reclaim our world and save humanity.
- 13
METAL GEAR SOLID V: THE PHANTOM PAIN
Single-player alternative to Mr. Sun's Hatbox — playable solo, no multiplayer required. Shares Action with Mr. Sun's Hatbox.
Ushering in a new era for the METAL GEAR franchise with cutting-edge technology powered by the Fox Engine, METAL GEAR SOLID V: The Phantom Pain, will provide players a first-rate gaming experience as they are offered tactical freedom to carry out open-world missions.
- 14
The Bureau: XCOM Declassified
Single-player alternative to Mr. Sun's Hatbox — playable solo, no multiplayer required. Shares Action with Mr. Sun's Hatbox.
The year is 1962 and the Cold War has the nation gripped by fear. A top-secret government unit called The Bureau begins investigating a series of mysterious attacks by an enemy more powerful than communism.
- 15
METAL GEAR & METAL GEAR 2: Solid Snake
Single-player alternative to Mr. Sun's Hatbox — playable solo, no multiplayer required. Shares Action with Mr. Sun's Hatbox.
The first and second title in the METAL GEAR series that established the stealth action genre, as well as the basic mechanics of the series.
- 16
METAL GEAR RISING: REVENGEANCE
Single-player alternative to Mr. Sun's Hatbox — playable solo, no multiplayer required. Shares Action with Mr. Sun's Hatbox.
Developed by Kojima Productions and PlatinumGames, METAL GEAR RISING: REVENGEANCE takes the renowned METAL GEAR franchise into exciting new territory with an all-new action experience. The game seamlessly melds pure action and epic story-telling that surrounds Raiden – a child soldier transformed into a half-human, half-cyborg ninja who...
- 17
Circa Infinity
Single-player alternative to Mr. Sun's Hatbox — playable solo, no multiplayer required. Shares Action and Indie with Mr. Sun's Hatbox.
Circa Infinity is a brain-melting circular platformer by Kenny Sun, with a pulse-pounding soundtrack by Jack + Jim Fay.
- 18
Tender: Creature Comforts
Single-player alternative to Mr. Sun's Hatbox — playable solo, no multiplayer required. Shares Indie with Mr. Sun's Hatbox.
Tender is a narrative game that explores connection and rejection in the era of swipe culture. It’s a story told by and through the modern interface for finding love.
- 19
YANKAI'S TRIANGLE
Single-player alternative to Mr. Sun's Hatbox — playable solo, no multiplayer required. Shares Indie with Mr. Sun's Hatbox.
YANKAI'S TRIANGLE is a love letter to TRIANGLES. A puzzling puzzle game about the beauty and joy of infinitely tapping on TRIANGLES for some reason.
- 20
YANKAI'S PEAK.
Single-player alternative to Mr. Sun's Hatbox — playable solo, no multiplayer required. Shares Indie with Mr. Sun's Hatbox.
Pyramid-Pushing Puzzles.
- 21
Twinfold
Single-player alternative to Mr. Sun's Hatbox — playable solo, no multiplayer required. Shares Indie with Mr. Sun's Hatbox.
A roguelike about merging golden babies and squashing angry faces.