Kokushi : Lost Island is a combat-free, quest-log-free exploration adventure. Wander a living island alone and search for 14 scattered mah-jong tiles to forge the legendary Kokushi Musou hand before nightfall. No mah-jong knowledge required.

Kokushi: lost island is a pure-exploration adventure with no combat and no quest log. You wander a living island alone, where time never stops, searching for fourteen mah-jong tiles to complete the legendary Kokushi Musou hand. ➤ Each play session takes around 10 to 20 minutes.<video class="bb_img" autoplay muted loop playsinline poster="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/3834720/extras/b4233742f8967fe4d6868f8d76f6286c.poster.avif?t=1752756632" width=512 height=324 ><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/3834720/extras/b4233742f8967fe4d6868f8d76f6286c.webm?t=1752756632" type="video/webm; codecs=vp9"><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/3834720/extras/b4233742f8967fe4d6868f8d76f6286c.mp4?t=1752756632" type="video/mp4"></video>■ Guide UI — Always Know What to Collect The on-screen Musou Gauge highlights every missing tile, so you can focus on exploration. Even players who know nothing about mah-jong can enjoy the hunt.<video class="bb_img" autoplay muted loop playsinline poster="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/3834720/extras/3394420c883c72326c5ad70b3657d6d6.poster.avif?t=1752756632" width=512 height=324 ><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/3834720/extras/3394420c883c72326c5ad70b3657d6d6.webm?t=1752756632" type="video/webm; codecs=vp9"><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/3834720/extras/3394420c883c72326c5ad70b3657d6d6.mp4?t=1752756632" type="video/mp4"></video>■ Beware the Sunset Exploration isn’t unlimited. Time advances in real-time, and the island is swallowed by darkness when the sun goes down. Gather all fourteen tiles before night falls.

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孤島の国士 Kokushi : Lost Island Achievements