Where to Download Tetris 99. Tetris 99 is available for free from the Nintendo eShop on the Nintendo Switch. The Big Block DLC can be purchased from the main title's product page in the eShop. You can also purchase a physical copy of Tetris 99 in stores or online.
Both tetris friends and tetris battle run on adobe flash. Last year it was announced that adobe flash was going to be discontinued, Rather than rebuilding the game for a more modern system, tetris online decided to just discontinue the games as it was easier and more cost effective.