Unless the buyer paid for that content inclusion, it is not theirs. The content you have paid for at the point of sale is the only thing you are entitled to ownership &/or lease.
There are so few instances of false advertising in the video game industry as to be nonexistent. The seller would have to knowingly and willing mislead the buyer at point of sale to be so.also the illegality of false advertisement
I do product quantitative research for litigation as part of my job. False advertisement is something companies are VERY careful about- as even their competitors can sue under these terms in the US.