A lot of those games hardly change. The differences between Gears of War and Gears of War 2 are miniscule. The changes within Resistance and Resistance 2 and PGR3 and PGR4 are tiny compared to those between SMS and SMG or LoZ: TWW and LoZ: TP. Plus, half your games are TBA 2009 and you have no clue whether they'll be delayed or whatever.