The worst game for unneeded complexity is Battlecruiser. Does Derek Smart honestly believe that thousands of years in the future we won't have developed a way to streamline these things? I feel more like I'm flying a Vietnam era helicopter than a super-advanced spaceship.
In addition OH MY GOODNESS. SimEarth may be one of the most ridiculously angry and rebellious games I have ever seen. It confounds me at every turn. First it wanted a disk. I remedied this by putting the files into a folder called ADrive and mounting A: to it. Then I went to install it and apparently none of my disks have enough room to install the twenty year old game, that's probably less than a megabyte.
EDIT: I got it to work, but it's late, so I didn't do much. I started at 1990 with modern human civilization in full swing, and within fifty years multicellular life was extinct. I turned off the sun, removed the clouds, and set continental drift on maximum overdrive. Within fifty years the Earth was completely covered in ice, and the only humans left were a few scattered tribes of bronze age nomads. Then life disappeared completely, and we went back to the geologic stage. Oddly, despite the complete lack of sunlight and warmth, the ice melted, revealing an alien world where the aforementioned high continental drift had torn our familiar continents to shreds, leaving hundreds of tiny island, which quickly filled with jungles. The heat continued to rise, and the jungles gave way to deserts. The single-cells stuck it out until the end, and lasted all the way to the sun's engulfing of the Earth.
It's a very melancholy game when I play it. I've always had the desire to watch a planet from a geologic scale, seeing species rise and fall. In fourth grade I had to have read The Time Machine at least five times, and I especially read the part where The Time Traveller continues into the future, and it's all crazy. I'd like to witness the twilight of a planet. It was almost depressing watching the Earth slowly die like that.
i think simearth is a pretty cool guy. eh lets you wipe out civilization and doesnt afraid of anything.