Co-op survival sandbox where builders, cooks, and fighters thrive together
Make the world truly yours in Junk Jack, a relaxing sandbox experience focused on building and improving your home. Discover new planets, tame and breed creatures, cook foods, collect animal companions, farm exotic plants, collect fish, grow flowers, play with your friends!



An effortlessly cozy yet deep world to build up together over weekends.
Make the world truly yours in Junk Jack, a relaxing sandbox experience focused on building and improving your home. Discover new planets, tame and breed creatures, cook foods, collect animal companions, farm exotic plants, collect fish, grow flowers, play with your friends!
Selected for the Logpier co-op catalog with a 78% positive rating across 442 Steam reviews (Verified Co-op Pick). Built for 1–6 Players via Online Co-op (All Players Must Own).
Structured around 2+ hrs (Multi-Session) (Survival / Story Campaign) sessions with drop-in/drop-out anytime into the shared world, making it an easy shortlist contender for game night.
Note: This guide is an AI-assisted curation summary synthesized from public Steam store metadata and user review signals. First-hand squad play notes submitted by community reviewers appear separately below.
The ideal weekend hangout for building a shared world at your own pace.