Somewhere, some time ago, I mentioned something along the lines of:
Worms - Great Concept, fun and striking gameplay.1
Worms 2 - Made by programmers, for programmers.2
Worms Armageddon - Worms 2, but redesigned for everyone.3
Worms World Party - Lightweight remake/redesign of Worms Armageddon for the kids to play with.4
Worms 3D - It had to happen eventually, and it didn't really work too well in this case either.5
Worms 4: Mayhem - Worms 3D for kids.5
Worms Reloaded (and more recent) - Ghosts of the franchise's past.
1 It's the foundation of the entire series. What else is there to be expected?
2 A signifficant leap in about every aspect of the original. However, it has an unusually technical UI: Game may feel like an independent game engine with a hackers UI extension rather than a solid game.
3 More and better awesome, but less customization though. It has what it needs, and it knows it.
4 Technically it's basically a remake of Worms Armageddon, but designed for consoles and online multiplayer. There is a lot of things Worms Armageddon got right that Worms World Party messed up. I say no more.
5 I like to describe Worms 3D as the 3D equivalent of Worms Armageddon, and Worms 4: Mayhem as the 3D equivalent of Worms World Party.