Like uncle Gary's night out, the horror let's up when you join the dead.
Slippery controls are a very rare, but terribly annoying problem that can and will get you killed, but only in the most demanding situations, such as boss fights and certain creature encounters. The gameplay is top-notch, a great blend of the survival, horror, and shooter genre, with just the right dose of story. This is the game the mam warned you about, and for good reason, its amazingly disturbing, twisted, disgusting, wrong, immoral, sacreligious, dark, violent, depressing, gory, bloody, profane, slightly sexual and... just plain awesome.
The graphics are gritty, but appropriately so for the content. Its a very interactive enviroment, you can flush toilets, listen to phone calls (Which are very disturbing, and horrific at times), turn lights on and off, kick open doors, move stuff, it gives the prison its own life. The prison after awhile is a living, breathing world with a wide array of characters that are all killed off fairly quickly (Which is possible to prevent). But many of these characters are the cruel prison guards who mess with you at the begining, just ask yourself "Do I want to save my captives?" If so, go right ahead.
The Suffering is veered towards a very mature audience, only the thickest-skinned, tough as nails, mental warriors can stand up to the noises, and disturbing imagery, anyone less than that, your discretion is advised. And at the end of the day, getting past all the dark and disturbing aspects, it's just plain fun.