Imperium is a 2-player game of conflict set in the far future. It simulates the clash between Earth (Terra) and an alien civilization, represented in the form of a widespread Empire (the Ziru Sirka). Both sides have a variety of starships to choose from. Movement takes place via 'jumps' from one star to the next, and conflict is resolved at these 'points'.
A bit more modified version, combined from the variants seen here and elsewhere. The imperial/senate cards mentioned in the text. The idea for the cards is not mine but someone elses, first mention I have seen was by user gilesclone on some geeklist. See comments