DUELBRAIN
REAL-TIME BRAIN BATTLE

Put your brain to battle.

DUELBRAIN is built around judgment, strategy, and mind games. Play Block Battle, Connect Four, and Seven Card Stud, where reading opponents and bluffing can decide the pot.

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GAMES

Three games. Three kinds of mind battle.

Each game plays differently, but every match comes down to your next move. Registered accounts can also use match records, history, and rankings.

01

BLOCK BATTLE

Block Battle

Place blocks from your hand and clear horizontal or vertical lines. Clear two or more lines at once to send garbage blocks to your opponent. Stay alive longer than your opponent to win.

Random MatchFriend MatchPracticeHigh Score
  • Random matches support records, history, and rankings
  • Friend matches are saved to history but do not affect rankings
  • Practice has no time limit; High Score is ranked
02

CONNECT FOUR

Connect Four

Choose a column and drop a medal from the top. The first player to connect four medals vertically, horizontally, or diagonally wins. Simple rules create a deep battle of prediction.

Random MatchFriend Match
  • Random matches track wins, losses, draws, and win streaks
  • Match records, recent history, and rankings are supported
  • Friend matches are saved to history but do not affect rankings
03

SEVEN CARD STUD

Seven Card Stud

Build the best five-card poker hand from seven cards. Read exposed cards, choose when to bet, raise, or fold, and compete for coins through bluff and deduction.

Random Match (2–4 players)Friend Match (2–4 players)
  • Random ranking is based on monthly net coin gain
  • Ante 10; betting units are 20 early and 40 late
  • Friend tables let the owner set starting coins and invite up to three friends
FRIENDS

Challenge your friends directly.

Registered accounts receive a dedicated Friend ID. Use it to send and accept requests, then challenge friends in Block Battle, Connect Four, or Seven Card Stud.

1Share your IDFriend ID in DB-XXXXXXXX format
2Send or acceptManage incoming and outgoing requests
3Challenge a friendInvite an online friend to a match
SUPPORT

Need help?

Find guidance for games, friends, and accounts. Account deletion is also available from Help.

Open Help