There's plenty of exploration in Rage, and often that level of discovery leads to bad guys, lots of bad guys. The enemies of Rage are varied, but they seem to have a common goal: kill you.
One of the most abundant baddies are the Bandits. Within the Bandits there are several clans each with their own unique skills, weapons and personality traits. Then there are mutants, no one knows for sure where they came from, but they're here, and they're angry. The main enemy is The Authority. I'm going to be honest, I don't know much about them yet. I do know they need to be stopped, or killed.
You can look forward to killing all these enemies and more on October 4th.