https://techcrunch.com/2019/01/10/unity-pulls-nuclear-option-on-cloud-gaming-startup-improbable-terminating-game-engine-license/

A pair of highly-funded gaming unicorns are publicly skirmishing and the deal could have major repercussions for game developers.

Today, UK-based cloud gaming startup Improbable, announced that Unity, a hugely popular game development engine, had terminated their license, effectively shutting them out from one of their top customer sources. If permanent, the license termination would be a significant blow to Improbable, which enables studios to host large online multiplayer games across multiple servers. The gaming startup has raised more than $600 million from top investors like Softbank, Andreessen Horowitz and Horizons Ventures.