as you can see, this is a picture that shows some main characters from RPG horror games. But, I don't know who the purple haired girl is. anyone knows who she is? From what game? sankyu!!
sorce : http://www.pixiv.net/member_illust.php?mode=medium&illust_id=44280323
Lesson here: learn to read tags.
I won't give the answer right away, because I think it's instructive for you to learn something here. It's in the tags somewhere.
I have encountered ones where tags indicating the game are absent, due to too many games being present. I'd be inclined to give the answer if it was extra difficult like that. This one, though, does have all the tags.
The purple-haired girl is from a game called 点滴ファイター (Tenteki Faitaa), which translates to (IV) Drip Fighter. I'm not sure if there has ever been a translation of the game, but the official Japanese site has stopped distribution of the game. From what I can gather it's not allowed to distribute, modify, make videos containing game footage, stream the game, etc., so I wouldn't get your hopes up.
Please note that I am not in any way fluent in Japanese and simply tried to make sense of what Google Translate gave me. If there's any errors in what I just said, then my apologies. I tried.