Designing enemy units in games

Here is an interesting link on how to design your enemies

http://www.gamasutra.com/view/feature/131735/designing_enemies_with_distinct_.php?print=1

Coordinated movement in games

I found this article about coordinate movement in games. Very useful :)

http://www.gamasutra.com/view/feature/131721/implementing_coordinated_movement.php?print=1