Lost

When you accidentally launch the alien space/time vehicle that you find crash-landed in the woods, you also accidentally damage the navigation circuit that would return you to Earth. A nice big game, with several alien environments to explore. Chiefly mechnical puzzles, with some random examination of scenery required. Occasional misspellings and a few bugs (for example, you can put a spacesuit in a box while wearing it.) One planet is strewn with mazelike areas, but at least the rooms in them come with complete direction lists. Hunger is a factor, unless you figure out how to prevent it.