IMHO.

A Plunge into Darkness vs KAKUSANKIBOU / 扩散希望

A Plunge into Darkness and KAKUSANKIBOU / 扩散希望 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. KAKUSANKIBOU / 扩散希望 (2018) is 2 years older than A Plunge into Darkness (2020). KAKUSANKIBOU / 扩散希望 is currently ~70% cheaper on Steam than A Plunge into Darkness (2.99 USD vs. 9.99 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 A Plunge into Darkness

Choose A Plunge into Darkness if you want a Strategy and Simulation experience. A Plunge into Darkness launched in 2020.

Choose KAKUSANKIBOU / 扩散希望

Choose KAKUSANKIBOU / 扩散希望 if it's currently about 70% cheaper on the Steam Store. KAKUSANKIBOU / 扩散希望 launched in 2018.

Both A Plunge into Darkness and KAKUSANKIBOU / 扩散希望 sit in Indie, Adventure, and RPG 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

A Plunge into Darkness vs KAKUSANKIBOU / 扩散希望 — Steam metadata comparison
A Plunge into Darkness — Steam game coverA Plunge into DarknessKAKUSANKIBOU / 扩散希望 — Steam game coverKAKUSANKIBOU / 扩散希望
Released20202018
GenresStrategy, Indie, Adventure, Simulation, RPGIndie, Adventure, RPG
PlatformsWindowsWindows
Steam DeckDeck PlayableUnrated
Price9.99 USD2.99 USD
Steam reviews76.5% positive (17 reviews)
MultiplayerSingle-player onlySingle-player only
DevelopersAldorleaあみそ組

Side by side

A Plunge into Darkness vs KAKUSANKIBOU / 扩散希望 — FAQ

Should I play A Plunge into Darkness or KAKUSANKIBOU / 扩散希望 first?
If you want chronology, KAKUSANKIBOU / 扩散希望 (2018) came out before A Plunge into Darkness (2020). 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 A Plunge into Darkness and KAKUSANKIBOU / 扩散希望 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.
Does A Plunge into Darkness run on Steam Deck?
Yes — A Plunge into Darkness is rated Deck Playable by Valve. KAKUSANKIBOU / 扩散希望 doesn't have a Deck rating yet, so its Deck behaviour is currently unverified.
A Plunge into Darkness vs KAKUSANKIBOU / 扩散希望 (2026) · imho.run