i was wondering if it would be possible to make 3 legs on an actor..

Currently, it is impossible.
You could do a Fake third leg, but that would be buggy.

Well, you could take one of the legs off a crab.

But seriously, that's a no. There may be some kind of spriting tricks that would make it look like an actor has a third leg, but I can't readily think of an easy method to do it.

[cheapfrenchacsent]Oh hoh hoo... I see what you did there... [/cheapfrenchacsent] Anyway, not possible.

What about the ungilax? *COUGH*

And the whole assertion that it will "Make the game buggy" is ridiculous.
The whole point of modding is to break it.

naaa crap... i was hoping i could make one of these...

Since the game is 2d, the side on appearance of that will have one leg behind the other... so add a background leg in addition that doesn't actually do anything.....

EDIT: Yeah, I didn't notice the fourth leg in the back there...

You could just make two of the legs in one of the sprites, right? Visually three legs, game engine sees two.

do you get to place each leg where you want individually in the coding?

Yes.

Also That Robo-Artillery has Four legs not three.

hence it should be an ACrab anyway.
quoting the uniglax is a stupid thing to do, that removes a leg rather than adding one. its functionally the same as a clone with its leg blown off, but ugly as hell.

not if you try to have 3, unless you use an ACrab, and dont try that because data ♥♥♥♥ the code. ACrabs are completely inept..

Um... I count four legs. You can still make that.

you could make it if it had 3, it would just be a crab which would gimp itself..

oh, it does have 4 legs... didn't notice that one back there.