That depends on your game - which means that you're asking in the wrong order.
You build a game around an idea or a story, you don't build it around a script.
And you should try to use as few scripts as possible in your game making - in fact you should try to make a game without scripts at least once, just to learn what the engine itself can do.
If you come to a stop during game development saying "I can't do this without scripts", THEN you start looking for a script that can do exactly what you need, and check if the available scripts are for commercial use or not.
Additionally, most scripts just require a small licence payment for commercial use - I don't know of any script that is absolutely forbidden to commercial use, they only state to contact the scripter to learn what you have to do or pay for commercial use (some just require a copy of the commercial game).
If you're new to commercial game making, I suggest you follow the link to the starting point in my signature and read the parts about going commercial or not - you'll need some money to spend for business licences anyway before you can sell a game, and a bit more to pay for script licences should not be a problem.