Nobody will develop video games without having in mind their social targets: children, teenagers, girls, boys, adults, old men. The battle of the sexes is older than the written history, and from that point of view, some of the video games are among the sexist things in the world. The Lara Croft's huge tits may have offended some women and some priests, but they were the main attraction of the game, right? I you are a man and you ever played that game you can not say no.
The third and last thing to consider is the history of the video games: early games had little care for the story, they were simple programs that were doing some things for amusement. Nothing fancy, nothing complicated (the technology and the design did not allow that) – but addictive and amusing. Only in time, together with the development of the computers and the software, the video games were able to develop stories and variants and a lot of other things that are considered by some people sexist. I am not sure how right are they, I haven't played all the existing video games and I have no intention to do that.
On the other hand, we are all thinking about sex. All the time. If you don't admit it you are lying. Some of our actions are driven by the desire to have sex, and the video games producers counts on that. Sex is selling good – so why shouldn't be some video games sexist? If you don't like it don't buy – there are other 10 people that are loving it. There are hundreds of video games available on the market, there is always something that you will love and play until the keys will melt under your fingers.
And, anyway, everyone has his/her own perspective of the world: what is sexist for me is very normal for other. Of course, that other may be a misogin, but who cares? I am not a girl and I am not so easily offended by a pear of nice breasts splashed all over my wind shield when I am chasing something or someone while playing a video game. I found amusing how some people were offended by the video games during their history – the article is here.