Are Lords of the Fallen and キラーの謎 -QUEST OF KILLER- similar?

They overlap on 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 キラーの謎 -QUEST OF KILLER- have multiplayer like Lords of the Fallen?

No. Lords of the Fallen supports multiplayer on Steam (Multi-player, Cross-Platform Multiplayer, Online Co-op), while キラーの謎 -QUEST OF KILLER- is listed as single-player only.

Does Lords of the Fallen run on Steam Deck?

Yes — Lords of the Fallen is rated Deck Verified by Valve. キラーの謎 -QUEST OF KILLER- doesn't have a Deck rating yet, so its Deck behaviour is currently unverified.

Lords of the Fallen vs キラーの謎 -QUEST OF KILLER-

Lords of the Fallen and キラーの謎 -QUEST OF KILLER- both land in 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 are RPG games on Steam. Both released in 2023. Lords of the Fallen has co-op; キラーの謎 -QUEST OF KILLER- 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 Lords of the Fallen

Choose Lords of the Fallen if you want an Action and Adventure game with Multi-player, Online PvP, and Online Co-op. On Steam, it's Steam Deck Verified, so handheld play works out of the box. 19,785 Steam reviews back the pick.

Choose キラーの謎 -QUEST OF KILLER-

Choose キラーの謎 -QUEST OF KILLER- if it's a focused single-player run rather than a multiplayer commitment. キラーの謎 -QUEST OF KILLER- launched in 2023.

Both Lords of the Fallen and キラーの謎 -QUEST OF KILLER- sit in 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.

Lords of the Fallen vs キラーの謎 -QUEST OF KILLER- — Steam metadata comparison
	Lords of the Fallen	キラーの謎 -QUEST OF KILLER-
Released	2023	2023
Genres	Action, Adventure, RPG	RPG
Platforms	Windows	Windows
Steam Deck	Deck Verified	Unrated
Price	29.99 USD	Price unknown
Steam reviews	73.4% positive (19,785 reviews)	—
Multiplayer	Multi-player, Cross-Platform Multiplayer, Online Co-op	Single-player only
Developers	CI Games	11PLANNING

Side by side

Both are RPG games on Steam.
Both released in 2023.
Lords of the Fallen has co-op; キラーの謎 -QUEST OF KILLER- does not.
Lords of the Fallen is Deck Verified on Steam Deck; キラーの謎 -QUEST OF KILLER- has no Deck rating yet.