Trying to remember the name of a game, kinda like Myst but not...?

I believe it was a one word name, starting with a T. I played it many years ago. It came on a set of CD-ROMs, and started with a long animated sequence where there's a crew talking, possibly about some sort of object, like a little pyramid, and then aliens attack their ship. This guy has to put on a suit and go back in time, and you play as the guy. I remember the guy's name is Gabe, and there's a little half circle robot in the corner that talks to you and makes snide little remarks. There's three parts, an Italian type place with lots of water, a himalayan buddhist temple type place that's been snowed in, and an aztec/ aboriginal type place with zeppelins across huge canyons. Does this ring a bell to anyone?