Hi
We at https://nooparmygames.com have been using Unity since v2.5 on windows and have done lots of projects. We have mostly worked on multiplayer games and editor tooling. We also have the wise feline series of plugins on the assetstore and can help you with your projects in both Unity and Unreal Engine. Since we have done a good deal of Unreal work in the past two years as well, we can help you deciding between the engines for your projects or in migrations in any direction between the two.
We provide fast turn arounds and a great deal of knowledge of performance, multiplayer and game AI and can help you to bring your projects one step closer to reality.
email us at support (at) nooparmygames.com to discuss your project.