Survival Shooter Tutorial
Learn how to make an isometric survival shooter game with this project from Unite training day 2014.
The Survival Shooter tutorial is still hosted by Unity:
Just not the project files... Just Unity things...
There's also this archived Q&A thread on the forums which may be of interest:
And I've made an extended version of this project:
Disclaimer: This project is no longer officially supported. Most likely you'll get no support from me either, just use take it for what it is.