2400 A.D. is a RPG published by Origin Systems (of Ultima fame) in 1987. The game is set in the year (quick! take a guess!) 2400 in the city Metropolis on the planet Nova Athens. Some 70 years earlier, the Tzorgs seemingly betrayed the humans and assaulted Nova Athens, presumably together with many other planets. Since then, they have left the planet but left control to a series of their robots, essentially enforcing a police state. You, a well-trained computer scientist, arrive on the planet with a batch of workers, only to stumble upon the diary of a resistance member, left there for you with the specific instructions to search for “Spider”.