Nintendo DS game Crossword DS + Sekai 1-shuu Cross (Japan), known as ニンテンドーDS クロスワードDS+ 世界1周クロス (Japan) in Japan, is a puzzle game developed and published by Nintendo. It is a compilation of two games, Crossword DS and Sekai 1-shuu Cross, that are both based on the popular crossword puzzle games. In Crossword DS, players create their own crosswords, while in Sekai 1-shuu Cross, players are presented with pre-made crosswords. Both games feature Japanese-style crosswords, as well as classic English-style crosswords. Crossword DS allows players to create their own crosswords from a variety of themes and difficulty levels. They can also customize the board size, the number of words, and the type of clues. Players can also create an unlimited number of puzzles, which can be shared with friends. Sekai 1-shuu Cross features pre-made crosswords from around the world. Players can choose from a variety of difficulty levels, from easy to expert. There are also a variety of themes, such as animals, sports, and history. Players can also compete against the computer or other players in a race to finish the puzzles. Nintendo DS game Crossword DS + Sekai 1-shuu Cross (Japan) is a great game for crossword enthusiasts. It features a variety of puzzles, from easy to expert, and allows players to create their own crosswords. It also features a competitive mode, where players can race against the computer or other players.