Worms Armageddon was the stand-alone expansion to arguably the best artillery strategy ever made... Worms 2. Though it lacks the insanely tweakable ammo and game settings of the original and doesn't have boobytrapped crates, WA is the best iteration in the series. Especially given that it's playable on modern Windows systems since the 3.16 patch.
Forget Reloaded and other new Worms games: this game delivers everything you'ld want in almost perfect style. Thing is: you could get really good at it. It allows a great deal of skill development and at the same time it's a very capable strategy in its own right. Figure out your own style of play: very creative or very effective. Mass damage or darksiding!
ALSO a must on any decent LAN so make sure everyone of your friends picks it up at a sale (or have a working install on your pc as the game is portable ;)
(PS just picked it up on steam, so time invested doesn't reflect the the real number of hours I spent on it since the 90's)