What is Citra?
Citra is a work-in-progress 3DS emulator. Citra can currently emulate, with varying degrees of success, a wide variety of different homebrew programs and commercial software.
Does that mean I can play ?
Citra can, ostensibly, "play" many different games, including The Legend of Zelda: Ocarina of Time, and Animal Crossing. Many games, however, will not load at all, only showing a black screen. Many other games will only show the title screen and then freeze, or crash.
You can expect many games to run slowly, though, and to exhibit many gameplay and graphical glitches.
If you're interested in 3DS emulation as an experiment, you may gain something out of trying Citra, but if you're simply looking to play games then stick to your 3DS handheld.
Which platforms does Citra support?
We're pleased to say that Citra works on all three major desktop OSs!
Citra is compatible with 64-bit versions of Windows, Linux, and OS X. In the far future, mobile platforms may be targeted as well.
What kind of specs do I need to run Citra?
At this point, Citra is simply not fast enough to run most commercial games at full speed, even if your computer can run the most demanding of PC games just fine.
The only hard requirement for Citra is a graphics chip that supports at least OpenGL 3.3, but you definitely want a processor with the highest possible performance per core.
Where can I download Citra?
At the moment, there are no stable versions of Citra for you to download, however, you can download nightly builds or compile from source. Once Citra has progressed to the point where a stable version becomes viable, we'll make those available for download.
How can I help?
Citra's source code is hosted on GitHub, which is a platform where developers can come together on a project, submitting pull requests with code changes.
You probably want to check out the contributor's guide and the developer information. You can look at the TODO list for ideas. Qt or GPU code (make sure to talk to neobrain on IRC first) would be very appreciated at the moment.
You can also chat with us at #citra on freenode. We'll take all the help we can get!