(I think this was placed in the right section, if not I hope a mod can move this).
I think 2010 was really the starting year for many indie games (especially multiplayer ones). A lot of people say that Minecraft was the indie pioneer because it inspired so many to make their own indies. I don't believe so though because many other great indies came out before it, but they weren't as popular. 2012 was also another great year for the indie gaming world, but it was also bad because many online games especially indies had to shutdown too because they lacked funding.