Video -> Board Game

I have been tasked with 'converting' my favourite video game into a playable board game for my next project. I think the basic themes and mechanics of the game need to be closely carried over to keep the essence of the game in tact.

I am going to create a board game based around Halo 4 as it is the new release in my favourite game series. There is already a Halo Wars: Risk board game based on land capture that I am obviously going to avoid doing something similar as not to do a direct copy.

The game is a First Person Shooter, and has a wide variety of weapons and vehicles so I am definately going to incorporate them in some way. My initial thoughts is something top trumps inspired with different damage stats etc.