Single-player games like Diamond
Below are 8 single-player Steam games similar to Diamond, 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 Diamond page.
Ranked picks
- 1
Idle Monkey Theorem
Single-player alternative to Diamond — playable solo, no multiplayer required. Shares Indie and Casual with Diamond.
Hire adorable typing monkeys and watch them randomly recreate the complete works of Shakespeare, one word at a time. Upgrade your monkey army, unlock powerful skills, and prove the Infinite Monkey Theorem right in this charming idle clicker.
- 2
Josh Powlison's BUTTON: Mildly Remastered Edition
Single-player alternative to Diamond — playable solo, no multiplayer required. Shares Indie and Casual with Diamond.
Press a button. Increment a number. Change reality. The instant classic returns for a mildly remastered electric boogaloo on modern computer systems. Once again experience the euphoria of button pressing with Josh Powlison's striking developer commentary to guide you.
- 3
Brainrotting
Single-player alternative to Diamond — playable solo, no multiplayer required. Shares Indie and Casual with Diamond.
Brainrotting is a "scroller" desktop simulator about doomscrolling or solving minigames, getting upgrades and eventually automating your dopamine generation.
- 4
I Can't Believe It's Not Gambling
Single-player alternative to Diamond — playable solo, no multiplayer required. Shares Casual with Diamond.
Do you love opening loot crates, but hate the tedious gameplay sessions in between? Our marketing department has the game for you! Unbox random items! Get stuff, but not what you really want! Skate legal and ethical lines! Remember kids, its only a video game, so grab your parents credit card!
- 5
Progress Bar Simulator
Single-player alternative to Diamond — playable solo, no multiplayer required. Shares Indie and Casual with Diamond.
Ever wanted to accelerate the progress bar of your download, slow installation, Windows update or just to kill some time until something else has finished? Then here comes the game you never asked for: Progress Bar: The Game
- 6
SKUFS AND ALT-GIRLS
Single-player alternative to Diamond — playable solo, no multiplayer required. Shares Indie and Casual with Diamond.
Alt-girl simulator in the form of tamagotchi and a visual novel with immersion in the Russian atmosphere!
- 7
WHAT THE GOLF?
Single-player alternative to Diamond — playable solo, no multiplayer required. Shares Indie with Diamond.
A silly physics-based golf parody where every golf course is a new surprising type of golf, some brilliant or hilarious, others so absurd you will ask yourself: WHAT THE GOLF?
- 8
Trombone Champ
Single-player alternative to Diamond — playable solo, no multiplayer required. Shares Indie and Casual with Diamond.
Honk, blow, & toot your way through over 60 songs, collect all 50 unique Tromboner Cards, and uncover the mysteries of the Trombiverse. Do you have what it takes to become the true Trombone Champ?