Seriously, this is the best game ever made. I am not lying!
Ive played it for about hundret hours in its steam version.
Some years ago Ive played for even more hours with the retail version. (I have plenty of them, always managed to lose the disc at some point heh) And when I was a kid Ive played Worms World Party when it was released for even even more. With my schoolmates Ive played the demo version on the same map over and over again for I-cant-even-remember-how-many-times. I bet Im scratching on the thousand hours now.
I dont think I could handle any real professional player online. There were some years of inactivity in between my sessions.
But being the best isnt really the point of the game. The point is to play with others and having a great time.
Its turn based, so its ideal for chilled evenings. When your turn is over you can chat with your enemys in the chat. The most enjoyable moments are these when something funny happens, when a whole dozen of worms are flying through the air or when a tricky shot succeed. Or failed and killed your own team instead the enemy.
Really, there are so many cool moments in this game you dont have in any other kind of games.
If you dont know anyone who plays with you, you can join the online servers. Depending of the daytimes you will find others to play with. If you fear this game will ever stop being popular online: Dont worry. The userbase was never really shrinking since its release. Of course playing with relatives is still way cooler than doing so with strangers.
And a few of the developer are still working on this game. They do fixes, keep it running on up-to-date computers and adding features. Still the game itself stays oldschool. I bet you wont find any game which are still getting that much attention from their devs.
If you get the concept of the game and like online matches with up to 5 other people from all over the world, this is your game. I think the single player of Worms World Party is better, but nothing tops the multiplayer of this timeless classic!