Deep co-op automation and base engineering where division of labor shines
Summer Islands is a holiday real-time strategy business simulator. Be the right businessman, build your holiday paradise and grab the money from your tourists. Play alone, with your friends and with computer enemies and survive natural disasters without going insolvent.



Pure cooperative flow state for friends who love building systems.
Summer Islands is a holiday real-time strategy business simulator. Be the right businessman, build your holiday paradise and grab the money from your tourists. Play alone, with your friends and with computer enemies and survive natural disasters without going insolvent.
Selected for the Logpier co-op catalog with a 81% positive rating across 192 Steam reviews (Verified Co-op Pick). Built for 1–4 Players via Online Co-op (All Players Must Own).
Structured around 2+ hrs (Multi-Session) (Survival / Story Campaign) sessions with join the host factory session anytime, 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.
One player optimizes belts while another explores—hours vanish effortlessly.