The topic of oversexualization in videogames is not a new one, but over the years, there have been countless examples of some games taking things way way too far - so over-the-top that you wonder who actually is signing off on this stuff. These are just a few examples of things going from 'passable' to 'those boobs are going to make her spine explode at any moment.'
1. Dragon's Crown - Sorceress
George Kamitani began conceiving of Dragon's Crown shortly after the 1997 release of Princess Crown for the Sega Saturn. When the game finally launched in 2013, the character designs had, uh, SHIFTED somewhat from their humble beginnings.
Not saying that the original design was a beacon of restraint or anything, but HOLY CRAP WHAT THE HELL.
2. Soulcalibur - Pretty Much Everyone (But Particularly Ivy and Sophitia)
Soulcalibur as a whole is often criticized for focusing a bit too heavily on women's breasts - and rightfully so. Look at the progression of the character Ivy from the simpler days of Soulcalibur 1 to the days of IV, where the sheer act of standing up would probably snap her spine in two. Miraculously, the series backed off a bit in V and began the slow process of de-escalating the insane sexualization of the character (not that they really had a choice - they had pretty much pushed things to their limit with IV, and the only way of going forward in that direction would have been to have her fight fully nude with two watermelons strapped to her chest).
Not that Ivy was an isolated case - here's Sophitia's progression from boob-shape-armored warrior to double-F cup toga partier.
3. Metroid - Samus
Metroid is a series that's often held up as a beacon for having a strong female protagonist who isn't completely defined by her gender and who isn't wildly sexualized (since she's in asexual power armor, most of the time). The weird thing is that the sexualization of Samus has been around from the very beginning - seeing Samus in less and less clothing is presented AS A REWARD for completing the game as quickly as possible. Still, the days of seeing pixel-bikini 'n boots Samus seems like the height of class compared to what happened to her in the later years.
Meet the Zero Suit - a skintight blue bodysuit that's almost as iconic for Samus as her bounty hunter armor. It was introduced in Zero Mission, as Samus was stripped of her armor and had to get by with only the blue spandex she had on her.
This was a pretty major step back for Samus as a symbol of feminine strength in the world of videogames. Luckily, it continued to get worse - with the introduction of space high heels and an ever-expanding chest in everyone's least favorite Metroid game, Other M.
Recently, Nintendo's decided to double-down on all the problematic aspects of the Zero Suit with Zero Suit Samus' appearance in the upcoming Samus Bros. for Wii U and 3DS. The space-high-heels now look even more impractical and Samus' space-boobs are about as big as her head.
Add that to the lack of Prime games since 2007 (and solo titles entirely since 2010), not even Luigi has been treated as shabbily as poor old Samus.