Using The Hammer Editor

Now I am by no means a mapper, but I feel like without including just a little bit about the editor this guide would be incomplete.To start off, goto create a new map file, and then just start mapping. As I said I am by no means a mapper so I can't help you there, but there are plenty of online resources to help you learn!After you've finished mapping, goand perform a Full Compile (you can un-check 'Load in engine after building' since you're just going to port the map into HLA anyway) by clicking 'Full Compile' and then 'Build'.Make sure you add a light to your level! I made the mistake of forgetting this and for hours thought the game was just not rendering my level!Entities from HLA do work in the editor, but they won't appear until you compile and run it in HLA. Just give the entity the appropriate name, for example, npc_zombie for a zombie and it will work!Use assets from the assets pack where possible, otherwise you could run into issues of missing textures or models.