Nope. We consider Zero Day to be somewhere between a successor and a spin off game. If you loved Dystopia, you will find a lot to love in Zero Day, with a lot of callbacks to your favorite weapons, classes, implants, and more.
We love Dystopia, and since we have maintained its development since 2007, we continuously work to keep it up to date.
Unfortunately no. Due to technical issues with Source SDK Base (like Dedicated Servers just not working,) we licensed the Source Engine for Dystopia and released it as a free standalone game in early 2018. While this license allows Dystopia to be playable, it prevents us from open sourcing Dystopia.