I've only done the first mission on Heroic so far. Here in a little bit, I'll be heading back into Campaign mode.

I've spent the past couple of days doing Arena mode (ranked play) with some of my co-workers. They're much better at this than I am, but they're also the ones who play all of the console FPS titles. I'm more of a PC guy when it comes to shooting things in the face, but I'm getting a much better handle on the controller lately. All the same, we're averaging a little over 60% wins right now.

Firefight mode is a MUST for anyone who needs target practice. Go ahead, try it on Legendary. Try not to die. I dare you.

Invasion mode is fun, but defending in the first round is tough when you're up against good players. Firefight Matchmaking always brings some interesting results... usually a win, but not always. 4v4 Team Battle is a total classic, but it's always best when you play with people you know. I also like the multi-team battle. Depending upon my partner, we usually finish in the middle. I haven't gotten a win on that one yet.

I've yet to do free-for-all. I'm typically a giant target in those modes...