Unity is the cross-platform engine used by many of my favorite developers to create everything from small indie gems to bigger, more well-known games. The company recently disclosed upcoming changes to its fee policy which would see developers pay per-install of their games. The out-of-the-blue announcement was controversial, prompting a variety of game devs to respond detailing why this would have a negative impact on their work, with some creators going as far as backing out of using the engine altogether.