Hi, this is Gabe Newell. Welcome to Absolute Pressure. After 10 years in development, hopefully it will be worth the wait. Thanks, and have fun.
Download both the AP mod and my mod folder containing resources for all my mods:
Enable both and play in the editor.
For certain unit specific scripts, look at existing missions I've made that have them setup. Certain types of units depend on being assigned a separate team; Combine soldiers team 0, Metrocops, striders, hunters, etc. all being other ones that are still allied to each other.
Certain bugs exist in the mod that I never bothered to fix. For example: using pistols for units in mid-low cover causes animations issues. Other issues with animations might be present.