I just finished HL:Blue Shift and it was ok... A little too short.  One of the games I am looking forward to is Perfect Dark Zero.  It's out on the 360.  Hopefully they will release it on the regular xbox.  I finished HL2 and Halo2 was pretty easy.  I can't wait for the expansion for HL2.  My daughter likes to play Mario so she can't understand the games I play. ;)