Choose Mission IDLE
Choose Mission IDLE if it's Steam Deck Verified, so handheld play works out of the box. Mission IDLE launched in 2020.
Mission IDLE vs Horus IDLE
Mission IDLE and Horus IDLE 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. Mission IDLE (2020) is 1 year older than Horus IDLE (2021). Horus IDLE is currently ~0% cheaper on Steam than Mission IDLE (2.99 USD vs. 2.99 USD). 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 Horus IDLE
Choose Horus IDLE if it matches what drew you to this matchup. Horus IDLE launched in 2021.
Both Mission IDLE and Horus IDLE 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
 Mission IDLE |  Horus IDLE | |
|---|---|---|
| Released | 2020 | 2021 |
| Genres | Casual | Casual |
| Platforms | Windows | Windows |
| Steam Deck | Deck Verified | Unrated |
| Price | 2.99 USD | 2.99 USD |
| Steam reviews | 90% positive (10 reviews) | 2 reviews |
| Multiplayer | Single-player only | Single-player only |
| Developers | Kadragon | Kadragon |
Side by side
- Both are Casual games on Steam.
- Mission IDLE (2020) is 1 year older than Horus IDLE (2021).
- Horus IDLE is currently ~0% cheaper on Steam than Mission IDLE (2.99 USD vs. 2.99 USD).
- Mission IDLE is Deck Verified on Steam Deck; Horus IDLE has no Deck rating yet.
Mission IDLE vs Horus IDLE — FAQ
- Should I play Mission IDLE or Horus IDLE first?
- If you want chronology, Mission IDLE (2020) came out before Horus IDLE (2021). 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 Mission IDLE and Horus IDLE 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 Mission IDLE run on Steam Deck?
- Yes — Mission IDLE is rated Deck Verified by Valve. Horus IDLE doesn't have a Deck rating yet, so its Deck behaviour is currently unverified.