Unreal Software 
Carnage Contest vs. CS2D
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Vectar666 has written
I dont like worms much because I cannot make new map or weapon. Cc has this possibilities, thats why I like it
You can make weapons on Worms 4 Mayhem with both the in game editor and out game tweaking if you know codes.
You can also make maps for W4M & W3D, there was something W4M/3D map maker or something called like that made by a fan for maps.
On topic , i think even though they're different type of gameplay i still like Cs2d better although i don't play it anymore.
Counter-Strike 2D
CarnageContest 
ofc cs2d is better couse it doesnt have that much bugs lol 