Star Trek Legacy

Easiest done on easy difficulty. I suggest keeping the enterprise style ship from the first era. When you start missions in the kirk era, just send the ship to the corner of the map and don't use it. The ship will be destroyed very easily since it has no shields. Once you start the Next Generation era, you have to start and finish a mission, or start the mission and quit the mission, and the achievement should unlock. As soon as the achievements unlocks, sell that useless hunk of junk!