Worms 2: Armageddon is a turn based, up to 4 player co-op, artillery tactics game. I also like to refer to it as a sandbox, side-scrolling, battle royale.

I have played and own every single worms game, but honestly have played most of them for only about an hour. However I do have dozens of hours on W.M.D, World Party, and this one.
That being said this is my favorite worms game.

The weapon roaster and level generator this time around are very versatile and replayable, always leading to an experience unlike the last.

Hands down, this game has the best art design. It's very colorful and bright, yet still very readable and clear.
Everything stands out and I always know what's happening, which is something I'd criticize some of the other Worms games for struggling with. This praise goes from the level themes to the user interface such as the weapon menu.

A final side note is something specific to the 360 era, but I just loved how and the ready up menu at the start of your turn, it would show your Xbox avatar making some sort of face or doing a pose. Helped remind whose team is whose and is just a nice detail!

The game has my favorite dialogue and character customization as well. Just many cleaver and funny choices to help my imagination when trying to make my own themed teams.

If I ever have a friend over, I offer to play some Worms and we always have a good time.