Keep in mind that in order to use full-screen effects, refraction etc. used in example scene (and visible at screenshots) you have to use Pro version of Unity.

Unity 4.x notice: This system is designed for Deferred Shading and Umbra Occlusion. Use both to achieve proper performance.
Unity 5.x notice: Use Deferred Shading with Linear Color Space to achive proper performance and rendering quality.

Check out the details from the Unity Asset Store: https://assetstore.unity.com/packages/3d/environments/industrial/he-the-bunker-megapack-v-1-19901

Now Download HE – The Bunker MegaPack v.1 Free Unity