Sid Meier's Starships Cheats...
Easy "A wondrous civilization" achievement
Control nine Wonders in total among your planets.
Easy "Knowledge is the key to success" achievement
Get three technologies to level six or higher.
Easy "Perpetual peace is a futile dream" achievement
Be the last surviving player.
Easy "Span the galaxy" achievement
Have 51% of the total population of the galaxy in your federation.
Easy "Women and children first" achievement
Search for the planet that has the "Countdown to Disaster" mission. Complete that mission by getting the colony ship to the warp portal.
Easy "Wretched hive of scum and villainy" achievement
Note: This is not the marauder planet. The correct planet has the "Den of Thieves" mission. Complete that mission.
