The sales of a game depend on the platform it is released on. The Switch had sold about 4.7 million units by the end of June and would probably be around 5.2 million by the time July ended. Arms sold about 1.2 million units on the Switch in about 5-6 weeks. That gives it about an attach rate of 23.1 percent to 25.6 percent which is fantastic for a new IP and a new exclusive in general. My estimates are probably off for the amount of Switches sold... but I'm still willing to bet that the attach rate for the game is still about at least 20 percent. Also these sales only account for around 1 month for the game's lifespan. Lifetime sales can easily land around 3-4 million. To give a somewhat similar comparison. Horizon Zero Dawn sold 2.6 million units both physical and digital on its first two weeks of release. The PS4 had sold around 57 million units by that point. On its first two weeks, Horizon Zero Dawn was able to muster up around a 4.6 percent attach rate which is decent. I would guess for the next 4 weeks... Horizon would be able to get its attach rate closer to 6 or 7 percent with both physical and digital sales and PS4s being sold alongside the game. Keep in mind that these are based off of MY very rough estimates... but Arms is still a relative knockout in terms of sales success.
