GamerNode's Anthony LaBella writes: When the ESRB tags a video game with an M rating, the purpose is to warn potential customers about suggestive and explicit content. These kinds of games have generated plenty of controversy, from titles like Night Trap to Manhunt 2. In recent years though, developers have started to put an innovative spin on the label. Games like Mortal Kombat and God of War are still out there, where excessive violence and gore are the main reason for an M rating. But some titles use it as a platform to tackle complex subject matter and explore new narrative boundaries. If this trend continues, it may be a huge stepping stone for the videogame medium. Here are just a few of the M-rated titles best representative of this new effort.