IMHO.

Rainbow Billy: The Curse of the Leviathan vs Promise Mascot Agency

Rainbow Billy: The Curse of the Leviathan and Promise Mascot Agency both land in Indie, Adventure, RPG on Steam, which is why they keep getting compared. The comparison below is built from each game's Steam metadata — release year, genres, categories, Steam Deck status, price, and review score — refreshed daily by imho.run's scraper. Headline differences: Both share Indie, Adventure, RPG on Steam. Rainbow Billy: The Curse of the Leviathan (2021) is 4 years older than Promise Mascot Agency (2025). Promise Mascot Agency scores higher on Steam reviews (97.1% positive) than Rainbow Billy: The Curse of the Leviathan (91.6% positive). No login or purchase needed — scroll for the full table, the verdict FAQ, and links to ranked similar games for both titles.

Which should you pick?

Choose Rainbow Billy: The Curse of the Leviathan

Choose Rainbow Billy: The Curse of the Leviathan if you want the Adjustable Text Size, Color Alternatives, and Surround Sound side of the pairing. On Steam, it's currently about 20% cheaper on the Steam Store. Rainbow Billy: The Curse of the Leviathan launched in 2021.

Choose Promise Mascot Agency

Choose Promise Mascot Agency if you want a Simulation game with Subtitle Options, Camera Comfort, and Playable without Timed Input. On Steam, it carries the stronger Steam consensus at 97.1% positive across 1,802 reviews.

Both Rainbow Billy: The Curse of the Leviathan and Promise Mascot Agency sit in Indie, Adventure, and RPG on Steam and both list Custom Volume Controls, Stereo Sound, and Adjustable Difficulty, so either pick lands in the same broad neighborhood. Use the side-by-side table for the feature view, or follow the "Games like" links below to see ranked alternatives for either title.

Side-by-side comparison

Rainbow Billy: The Curse of the Leviathan vs Promise Mascot Agency — Steam metadata comparison
Rainbow Billy: The Curse of the Leviathan — Steam game coverRainbow Billy: The Curse of the LeviathanPromise Mascot Agency — Steam game coverPromise Mascot Agency
Released20212025
GenresIndie, Adventure, RPGIndie, Adventure, Simulation, RPG
PlatformsWindowsWindows
Steam DeckDeck VerifiedDeck Verified
Price19.99 USD24.99 USD
Steam reviews91.6% positive (119 reviews)97.1% positive (1,802 reviews)
MultiplayerSingle-player onlySingle-player only
DevelopersManaVoid EntertainmentKaizen Game Works

Side by side

Rainbow Billy: The Curse of the Leviathan vs Promise Mascot Agency — FAQ

Which is better, Rainbow Billy: The Curse of the Leviathan or Promise Mascot Agency?
On Steam reviews Promise Mascot Agency scores higher (97.1% positive) than Rainbow Billy: The Curse of the Leviathan (91.6% positive). Both have enough reviews to trust the signal, so for players using reviews alone, Promise Mascot Agency is the safer pick. Genre fit still matters — check the side-by-side table for the categories each game lands in.
Should I play Rainbow Billy: The Curse of the Leviathan or Promise Mascot Agency first?
If you want chronology, Rainbow Billy: The Curse of the Leviathan (2021) came out before Promise Mascot Agency (2025). If neither is a sequel to the other, order doesn't really matter — start with whichever fits your current mood, since both share enough on Steam to make either a reasonable opener.
Are Rainbow Billy: The Curse of the Leviathan and Promise Mascot Agency similar?
They overlap on Indie, Adventure, RPG on Steam, so the catalogue groups them together — but "similar" depends on the specific mechanics. Use the genre + category rows above to decide whether the overlap matches what drew you to the one you've already played.
Do Rainbow Billy: The Curse of the Leviathan and Promise Mascot Agency both run on Steam Deck?
Yes — both are Steam Deck Verified, meaning Valve confirms they run with full controller support, legible text, and default settings out of the box.