https://www.cnet.com/news/get-a-free-game-when-you-buy-a-switch-at-best-buy/

Step 1: Go to Best Buy's site and add the Switch console to your cart.

Step 2: Pick a game from the lengthy list of eligible games and add one to your cart. With the console and game in your cart, the price of the game will be removed at checkout. That's it! You can save up to $59.99.