Halo 3 used different engine than 2 and ODST is using Halo 3 engine - Reach will use completely new engine.
to all those ps3 fanboys who can't stand the fact that ODST is really good game and considering the content of this game 40$ price is a steal(atleast in europe since i think NA is getting this game for 60$ - for once europe is better). seriously Halo 3 alone still costs 20-25$ new, dlc packs are for about 18$ so basically you are getting ODST for free.
and yes, Killzone 2 deserves 7/10(controls and shallow gameplay can't hide behind shiny graphics and effects) and MGS 4 deserves 8/10(now if MGS4 would be more like an actual game.....).







