The trance achievement is not done in the mode you unlock after completing the lost area.
The achievement says you need to complete direct assault on trance. Direct assault is a game mode in the beyond section of the game where you play from level 1 through 5 non-stop and it takes around 60 mins. There are 5 or 6 different direct assault settings starting with normal. I've run through the normal one and i unlocked ambient so my guess is that one of these is trance which you then need to complete for the achievement.
Tips for score attack:
Combo as much as you can! It took me a few tries to complete these as i was rushing to kill things too quickly. The main trick to score high is to let the bosses live as long as possible. For example on the very last boss, instead of shooting the rings in the middle to open up the core, you need to take out all of the things that get shot out around the area chaining them up to max as much as possible. The score attacks should be fairly easy if you have cleared all 5 areas.
Last edited by Penn; 02-01-2008 at 12:49 AM.