I don't know about the very best, but the first one was pretty fun.
The PC port of the first game wasn't that great to be honest. Sure, it was Halo, but I didn't find myself caring that much. It also has online, but what kills it in my opinion is that there's a delay for all your actions and when they'll be registered. In a way, it reminds me of playing an RTS online where if you issue an order, it'll take a moment for the order to go through. It's similar in Halo, you have to aim infront of a moving target to hit him.







