Halo Wars Tips and Tricks

OmniscientDeath and I have played through the entire campaign, collecting all the skulls, black boxes and special campaign achievements. Here's some general tips:

• Playing campaign on co-op is more fun than playing by yourself.
  
• The game can get laggy though, so recommend a fast connection.
• Budget about 7 hours to get through on Easy if you're working co-op on skulls and black boxes.