Here's an unexpected opportunity for Unity 3D game developers to develop 2D games.
About this challenge the Unity team come with this info:
The prizes:
1st - $2000
2nd - $1000
3rd - $500
Special Mention - $500
Join the Unity 2D Challenge to become part of an exciting community journey exploring the possibilities of our new 2D tools.
How to participate
Create a small piece of content using Unity’s 2D tools. It can be anything from pixel-perfect retro-style art to a snippet of hand-drawn platforming gameplay or a thin vertical slice of a 2D competitive brawler. Anything goes, as long as it’s 2D. See the FAQ at the bottom for more info.
See this video intro: