4 vs Hanabi Chain

Go for 1st place or just avoid last — your strategy is your own. ■ Rules ① The basic rules are just like traditional Othello: players take turns placing stones and flip the opponent’s stones when sandwiching them. ② When the board is full, rankings from 1st to 4th are determined by who has the most stones. ③ If you can't make a valid move, you can place a stone on any empty space adjacent to an opponent’s piece. ■ Online Play ・Battle real-time with players around the world! ・Share a room code to easily play with friends. ・If fewer than four players join, CPU players will automatically fill in. Fully free to play — no hidden fees!

■ Tap the night sky. Your firework starts the chain. Hanabi Chain is a beautiful, deep firework puzzle you play with a single tap. Tap anywhere in the night sky and your firework launches from the bottom, arcs up, and bursts right there — igniting the rising orbs around it so they explode too, spreading into a chain. ■ Easy to play - Tap the sky → your firework flies to that spot and bursts - The blast ignites nearby orbs → they burst and the chain spreads - Burst higher for more points — but time it before the orbs escape off the top - With only 3 shells per stage, WHEN and WHERE you fire decides the chain ■ Easy to learn, deep to master Simple rules — but once you start planning the order and the perfect spots for the biggest chain, it gets wonderfully deep. Bloom casually for the feels, or aim and connect for the glory. ■ Special shells to mix - Big: ignites a wide area at once - Pierce: a straight vertical lance - Time-Stop: slows everything so you can aim - Two-Stage: bursts a second time in the same spot - Rainbow: a wildcard that connects with any color Chain the same color for a bonus. Read the field and build your max chain. ■ Endless worlds Space, deep sea, aurora, volcano, sakura nights, cyber city, sea of clouds, crystal caves... 100+ themed worlds across 500 stages. Each world has its own night-sky palette and music, with a living sky that reacts to every burst. ■ Endless mode The deeper you go, the harder it gets. Chase your best depth and score. ■ Hanabi Collection — collect shaped fireworks As you play, you unlock fireworks that form shapes — cat, heart, star, butterfly, Saturn, willow and more. Pick your favorites and they'll appear at random when you launch. Grow your own firework collection. ■ Great for - Quick one-handed play in spare moments - Relaxing with beautiful visuals - Fans of simple-yet-deep games to master - Anyone who loves fireworks Tap the sky and bloom your own grand finale.