good guide for a great game. the key here, as in ikaruga, is memorization. and for that, the videos will help a lot.
and Jim, are you sure that beating levels on adventure mode donīt unlock the achievements for championship? i mean, i played the game ages ago, but i thought that getting all achievements in a single run was possible (in theory).
retail + dlc: 18
last retail: Gears of War
xbla + dlc: 3
last arcade: Geometry Wars: Retro Evolved 2