Μετάφραση - Αγγλικά-Γαλλικά - The board is locked, unlock it in star collecting...

This is a line from our game.
Board: game board (like chess board, reversi board etc.).
Ranking mode: the computer difficulty of the game marked with ranks
Star collecting mode: the player need to collect "stars" on the board (like most games: 0-3 stars)