Crystal discovering a certain doujin starring herself and...tentacles.
The Orz-like speech that is partially-translated Cordi.
Various members of Hard Light Productions cameoing as a squad of extremely weird, but skilled, fighters, set to very silly music.
Goddamned Bats: Cordi Soldiers and Warriors. They can literally fly circles around even the Terran Ray Mk. III, and they can glide. Fura'ngle Sweepers and Astrays also fit: they can fire in any direction, regardless of which way they're facing. Get caught between three or four and watch how quickly you die.
Good Bad Bugs: In the final "outro" sequence, ships from the various factions all jump out on screen, and some do a strange tumble as they enter their warps. This was not intended, but it does look very funny, and many feel that it fits well with the feel of the scene.
Les Yay: Misuzu hugs Crystal during a debriefing... then goes on to comment on how the Cyrvan's breasts feel.
They Changed It, Now It Sucks!: Missiles behave somewhat differently than in the original FreeSpace, leading some players to label them as useless. Other players insist that they're simply not using them properly.