Alien Adventure: A band of aliens that travels the galaxy looking for planets to conquer discovers a small blue green planet that they think will be perfect for their newest base. However, when their scouting party lands in a soon to be opened virtual theme park the begin to have second thoughts.
Besides having the biggest screens of any theatres the IMAX format also allows for excellent 3-D effects. While there have been several attempts to exploit this format most of them have consisted of paper thin plots that serve to connect the special effects sequences and showcase what is possible (Encounters in the Third Dimension however did manage to combine both aspects successfully). This feature is no different.
Adventure 3-D sequences are very well done - you feel like you are actually on a roller coaster, (they were so well done that I almost got as sick as one of the characters in the movie). Unfortunately, that's all there is- each sequence is a slightly retooled version of its predecessor.
Once you take into account the length of the film and the cost, you're better off going to Six Flags (or any other big amusement park) for the real thing - it will cost less and be more exciting.