Just another dating sim designed by refugees from 4chan as a result of an anonymous post on /a/. Also, all the girls are disabled in some way -- Katawa is roughly translatable as "retard" or "cripple;" it's not a nice word. Heartwarming, right?
But, shockingly, it's the best portrayal of people with disabilities I've ever seen, far outstripping those you see in the mainstream media, mostly because those are limited to Professor X.
The characters are written with love, as people who are not defined by their disability, nor ignorant of it, but overcoming it as best they can. The easy way to write a game like this would be to make the big strong hero show up and save the poor disabled girl, but instead we are obligated -- or given the opportunity -- to appreciate them as complete individuals, just like you or me. The hero himself has a condition, and a good amount of the story is devoted to his own efforts to come to terms with his disability, and the changes in his life it necessitates -- instead of being othering, the effect is to create an overarching narrative of coming to terms with disability. But, more than a narrative, it's a true slice of life -- a life many people may never have lived. There's a force for social change here.
The game isn't complete yet; after two years of development, they've just released Act I, a scant few hours of gameplay, but a demo that cries out for recognition. In many ways, this game is an example of the power of independent development -- can you imagine Electronic Arts funding this? And can you imagine it being worth playing if they did? This is the power of passion, dedication, and consumer-pro tools. There ought to be a movement.
N.B.: The game's currently available only as a torrent, so you'll need a Torrent client to download. Also, when I downloaded the Windows version, it came without a file extension. However, renaming to add ".exe" and running it worked fine.