Generations' away missions offer the most potential, but fail to deliver. Generations dumps the 2-dimensional world for 3d. You can look up, down and behind you, just as you did in Doom. Frequently, the game taunts players with targets to shoot, as in Doom, but combat is not always the right answer, thankfully. The puzzles, sadly, were not always intuitive and are tedious.
Generations offers obtuse puzzles, usually in the form of doors.
Although away missions are 1st-person, other crewmembers could have attended rather than the one you play. Generations' has a coherent plot, as long as you ignore the movie. Buying the rights to a movie and then ad-libbing is a common, if uninspired method in the gaming industry. Generations is not a Star Trek game. There is no character development, ethical dilemma nor resolution for the principal characters.