Yes — co-op. Unboxing the Cryptic Killer is a co-op puzzle & chaos game released in 2023, 91% positive on Steam (1,985 reviews), with 19 playing right now. $3.59 on Steam.
Unravel the mystery of a cryptic box in this 2-player co-op puzzle game. Join forces as two detectives, solve cooperative puzzles, communicate effectively,…
Steam tags: Puzzle, Online Co-Op, Escape Room, Point & Click, Mystery, Adventure, Casual, Exploration
Ready Up compares two Steam libraries and shows every multiplayer game you both have — including whether Unboxing the Cryptic Killer is one of them — then helps you pick tonight's game with a weighted roll or a bracket.
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Ready Up is a free tool: enter two Steam usernames and it lists the multiplayer games you both own, runs a bracket to pick one, and suggests new co-op games that fit how you both play. Ratings, tags and player counts from Steam and SteamSpy; page updated 2026-09-09. Powered by Steam — not affiliated with or endorsed by Valve Corporation or Microsoft. How the data works · Legal & privacy · All types · Game Pass