A fun concept here with some interesting ideas. The way you've streamlined and simplified the core Havoc Engine rules feels very clean. One thing that did occur to me, however, was I wonder if, in stripping out a lot of the crunch, there might need to be some additional ways for the narrative or role-playing to affect the outcome as it might feel that the players have limited mechanical means to influence success. Also, I did really like the layout and design, it's gorgeous work.