Reached 1000G in two days. Final verdict: very easy to 1000G, a few challenges are frustrating at times if you did 3-stars leveled like I did, game probably had a lot of potential in versus mode except for the netcoding problem on release that prevented a lot of people from playing online.. quite a shame. Storyline could have been better and I really didn't like how the campaign.. and solo play.. and versus.. are all the same objective-based maps and game modes.
I have a feeling if they made a Brink 2 they could fix a lot of the problems but I don't think this game was successful enough for that.
Anywho I would recommend this to anyone looking for a cheap game for achievements and/or easy 1000G, you can buy it used on Amazon for $7.