Sahara belongs neither to the Indiana Jones genre nor to the regular action flick category. The dialogue was so cliched that I could literally predict the words before they left the mouths of the actors. Why do all action movies have to have the mandatory geeky sidekick? The way Steve Zahn kept on about losing his hat during the various chases was irritating. Except for the scene where the good guys defuse the bomb in the plant and rescue Penelope Cruz (lousy choice for leading lady), the action sequences were singularly unimpressive (the way Matthew McConaughey brings down the chopper with a Civil War era cannon was breathtakingly incredulous).
All in all, Sahara gives XXX-2 a good run for its money in vying for the worst movie of the year.