Well sorry for such a late reply. I forgot about this thread.
Gordon freeman plays really well. He's got this little creatures as his special move and just for impressions sake, I max leveled him. His later upgrades make the creatures really powerful, they start attacking everything around you and give you alot of points. There's alot of scoring competition in this game i've noticed and gordon freemans creatures really pump them up.
Anyway, why I decided to bump this thread is because there's new DLC. I went with the intention to buy them, but it seemed i got them for free because of my pre order. Yes I am very happy.
There are two dlc packaged. New levels in an ice themed package
And new vehicles. I haven't tried anything out yet but I hadn't seen anyone mention it, so there you go. More content for a great game that lasted too little.
I am having alot of fun with this game :D