While most of the attention Nintendo gets these days involves the Switch (and that system’s recently revealed DIY cardboard toy controllers), the Nintendo 3DS platform is still killing it. Nintendo announced today that the 3DS family of systems just had its best month of sales since December 2014.

According to Nintendo, citing NPD Group sales estimates, the company sold more than 750,000 2DS and 3DS systems in the United States during the month of December. That’s a 27 percent increase over the same period in 2016, pushing 3DS hardware sales past 21 million in the U.S., Nintendo said.

Worldwide, 3DS hardware has sold more than 69 million units, meaning it still has some catching up to do to reach the Nintendo DS, which sold more than 154 million units, and Game Boy, which sold more than 118 million units.

Nintendo’s current lineup of 3DS hardware includes the $199.99 New Nintendo 3DS XL, the $149.99 New Nintendo 2DS XL and a pair of Nintendo 2DS bundles that cost $79.99 and come with a pre-installed game. Nintendo has a Pikachu-themed New Nintendo 2DS XL coming stateside later this month. It will cost $159.99.

For a system that launched in early 2011 — and famously stumbled out of the gate — it’s an impressive run. Nintendo still has a handful of confirmed 3DS game releases on its slate for 2018, including Kirby Battle Royale, Detective Pikachu and Sushi Striker: The Way of Sushido.

As for the rest of Nintendo’s hardware lineup, the company said it sold 1.5 million Nintendo Switch systems and roughly 350,000 Super NES Classic Edition consoles during the five-week reporting period of December.