The Nintendo 3DS is a portable game console produced by Nintendo and was released in 2011. The is capable of displaying stereoscopic 3D effects without the use of 3D glasses. The 3DS is backwards compatible with the DS and DSi. It's main competitor is the Playstation Vita from Sony.
Sales of the 3DS were a bit lackluster in the beginning, partly due to its relatively high launch price. This caused Nintendo to drop the price by a third only a few months after launch. Today thanks to a solid games library the 3DS is the most popular portable game console.
A few variants of the 3DS exist: an "XL" version which (as the name suggests) is larger than the original and the 2DS which lacks the ability to view games in 3D and doesn't have hinges. In 2014 Nintendo released the "New" 3DS with upgraded processor and additional controls. Despite the launch of the Nintendo Switch in 2017, which can also be used as a portable gaming device, Nintendo has announced continued support for the 3DS for the foreseeable future.
3DS emulation is still in the early stages. Not all games will play, and those that do may exhibit glitches.