If anyone does ever want to play something great with jetpacks then try Tribes: Vengeance. It came out the same year as Half Life 2 so was ignored by lots of people (personally, I prefer Vengeance), and fans of the original games typically hated it because it 'dumbed down' some of the intricacies (read: bugs) found in the originals.
Short story: it has jetpacks, a grappler, and the ability to ski. Along with some massive outdoor levels which could be crossed in seconds with the right level of skill.
Short story: it has jetpacks, a grappler, and the ability to ski. Along with some massive outdoor levels which could be crossed in seconds with the right level of skill.