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Heads Up! Phones Down Edition vs Idle Monkey Theorem

Heads Up! Phones Down Edition and Idle Monkey Theorem both land in Casual 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 are Casual games on Steam. Heads Up! Phones Down Edition (2023) is 3 years older than Idle Monkey Theorem (2026). Heads Up! Phones Down Edition has co-op; Idle Monkey Theorem does not. 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 Heads Up! Phones Down Edition

Choose Heads Up! Phones Down Edition if you want the Multi-player, Shared/Split Screen, and Shared/Split Screen Co-op side of the pairing. On Steam, it has co-op, so you can bring a friend. Heads Up! Phones Down Edition launched in 2023.

Choose Idle Monkey Theorem

Choose Idle Monkey Theorem if you want an Indie game with Playable without Timed Input, Mouse Only Option, and Save Anytime. On Steam, it's the newer release (2026) and ships with the modern feature baseline. Idle Monkey Theorem launched in 2026.

Both Heads Up! Phones Down Edition and Idle Monkey Theorem sit in Casual on Steam, 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

Heads Up! Phones Down Edition vs Idle Monkey Theorem — Steam metadata comparison
Heads Up! Phones Down Edition — Steam game coverHeads Up! Phones Down EditionIdle Monkey Theorem — Steam game coverIdle Monkey Theorem
Released20232026
GenresCasualIndie, Casual
PlatformsWindowsWindows
Steam DeckDeck PlayableUnrated
Price39.99 USDPrice unknown
Steam reviews7 reviews—
MultiplayerMulti-player, Shared/Split Screen Co-op, Co-opSingle-player only
DevelopersAspyrOzymandias

Side by side

Heads Up! Phones Down Edition vs Idle Monkey Theorem — FAQ

Should I play Heads Up! Phones Down Edition or Idle Monkey Theorem first?
If you want chronology, Heads Up! Phones Down Edition (2023) came out before Idle Monkey Theorem (2026). 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 Heads Up! Phones Down Edition and Idle Monkey Theorem similar?
They overlap on Casual 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.
Does Idle Monkey Theorem have multiplayer like Heads Up! Phones Down Edition?
No. Heads Up! Phones Down Edition supports multiplayer on Steam (Multi-player, Shared/Split Screen Co-op, Co-op), while Idle Monkey Theorem is listed as single-player only.
Does Heads Up! Phones Down Edition run on Steam Deck?
Yes — Heads Up! Phones Down Edition is rated Deck Playable by Valve. Idle Monkey Theorem doesn't have a Deck rating yet, so its Deck behaviour is currently unverified.
Heads Up! Phones Down Edition vs Idle Monkey Theorem · imho.run