Complete the game with the indicated race to unlock the corresponding bonus.

Effect	How to unlock
The Cardassians	Borg Unicomplex map for Skirmish mode.
The Breen	Sha Ka Ree map for Skirmish mode. This is the "God" system from Star Trek V.
The Dominion	Xindi Skrimish Set which includes the Reptilian cruisers and Insectoid fighters.
The Federation	Second Federation Skirmish Set which includes the Sovereign, Nebula, and Oberth vessels.
The Klingons	Borg Skirmish Set.
The Romulans	Talos IV map for Skirmish mode. This is from "The Cage"/"Menagerie" episodes of the original series.