Does it cost money to get games on lg rumor touch?

So today I just got the lg rumor touch and I wanted to know if I download games will my bill come in high or will it stay the same and If it will is there any other way to add games to my phone like put it on an SD card or somethingDoes it cost money to get games on lg rumor touch?
if you download them, yes it will cost money.

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