Nice little extra story in GTA IV - same time, same city, but a different perspective. The plot is mostly independent from the main game and the second DLC, but at some points connected with them or indirectly referenced, just like Half-Life and its add-ons. The biker theme is really cool and isn't as common in videogames as it should be. The missions are just as good and unique as in the main game, unlike Undead Nightmare DLC for RDR which mostly was cemetery cleansing x100 times. Also, plenty of new vehicles (mostly bikes), few new weapons and improved handling for motorcycles to encourage using them. I prefer the main game story, but this one is also great and an absolute must for the complete GTA IV experience.