There is a Raid 2, but I don't think I have EVER seen a sequel make such a departure in tone and structure from the first than with these movies. The first Raid is a taut, lean thriller that has barely any dialogue, takes place entirely in one location, lasts an hour and a half, and has less than 5 characters that you remember when it's over. The story is about a guy who needs to go from the bottom floor of a building to the top floor.
In contrast, Raid 2 is 2 1/2 hours long, has a million characters, has a plot that I could not possibly explain despite having seen the movie twice, and is filled with meaningless, outta-nowhere scenes that have no connection to the plot or the characters. It's a complete WTF movie, though the action pieces are incredible and the whole thing is a big hot fascinating mess.