It's a 2D Worms game but with a 3D engine, unlike previous Worm games in the past ,objects you see sticking out of the terrain in a map now have physics properties, they can bounc around,crush other worms,explodes,emit poison gas or even throw water around and there's now a seperate water in the game that also has some very nice looking physics to it when it moves around, this water doesn't instant kill your worms like the regular water at the bottom of the map but instead drains 1-3 HP per turn if a worm is submerged in it and everything in it moves slower (both worms and projectiles).
There's also now classes in the game, Scout,Heavy and Scientists (+ the normal worm).
Heavy is the slowest but can take the most abuse
Scout is the fastest,has the highest jumps and can perform some crazy maneuvers while walking thru terrain buuut has the lowest HP and dies the fastest
The Scientist is pretty much a healer, each turn he heals 5hp and that's about it.
However if you don't wanna play with these new classes you can just simply play the Classic mode where every worm is a regular worm like in the older games.
That's pretty much it, everything else is the same, It's the Worms game we all know and love since the 90's.
Only major complaint i have, there's a big lack of enviroments, all you have is Beach,Sewers,Horror and a 4th one which i can't remember the name of atm, while in older Worms games you usully had at least 6 to 10 (sometimes more) enviroments for a map to keep things abit more esteticly different each time.
Bottom line, it's still Worms but with a new makeover and some new fun things added it. Totally worth picking up during a nice sale and playing a few matches with your friends either via the internet or on a single computer.