The Nintendo Switch system sold more than 906,000 units in March, according to the NPD Group, which tracks video game sales in the United States. That makes Nintendo Switch one of the fastest-selling video game systems of all time. Notably, this sales surge was accomplished in a nontraditional month for a console launch.

The Legend of Zelda: Breath of the Wild game sold over 1.3 million units, which includes more than 925,000 units sold for Nintendo Switch and nearly 460,000 units sold for the Wii U console. That means that Nintendo sold more of this game for Nintendo Switch than it sold Switch systems, for an attach rate of more than 100%. This may be attributed to people who purchased both a limited edition of the game to collect and a second version to play.

This was all enough to make The Legend of Zelda: Breath of the Wild the fastest-selling Nintendo launch game of all time, as well as the fastest-selling game ever in The Legend of Zelda series.

“Nintendo always strives to offer consumers something fun, new and different,” said Reggie Fils-Aime, Nintendo of America’s President and COO. “With its various play modes and the innovative features of the Joy-Con controllers, Nintendo Switch provides unique experiences that people can take with them anywhere and share with anyone.”

While Nintendo Switch sales are off to a record-breaking start, shipments have not yet been able to keep up with such high demand. Nintendo is working to make sure everyone who wants a system is able to buy one, and more systems are continually being shipped.