by losing races
You can play 2 players on NFS Hot pursuit by online play.
You have to create a profile in EA games. But they are giving you the opportunity to play offline. But it will ask you everytime to connect to online. Go to EA webpage to know more.
There are no cheats available for NFS HP 2010. Basically it's an online game. But you can play offline too.
Well, some places say yes, some no.