Thanks for the informative post
A few days ago I found an article for the A* pathfinding algorithm (they are talking about it in the forum thread you gave), so I guess I have to start coding it and start making the game step by step. First - game with zombies (with the pathfinding algorithm and LOS), then human soldiers (with taking cover, retreat and so on), etc. It's gonna be a tough job and I don't have that much time but I'll see what I can do. There are so much things that have to be taken in consideration if I want to do an AI smarter than a mindless zombies.