its episodic content for gta iv exclusive to the xbox 360. the first episode was the lost and damned and focused around your character who was in a biker gang. there was new bikes to ride and weapons and some new gameplay elements. it added about 10 hours or so of new shit to do in the lost in damned only. lost and damned and gta iv are seperate games and neither effects the other.
the ballad of gay tony is the 2nd episodic content. this time your a drug dealer type working for a gay guy who owns both str8 and gay night clubs. so you work for him. its pretty tight the way rockstar sets these up. i believe this guy is luis the guy you met at the fat black hoes house on the top right island.
the lost and damned how references of the character from that running into nike belic and how there stories matched in some instances. pretty cool. lost and damned was tight lookin forward to this.