What parents should know is: Its very gory, but! the gore can be turned off so no heads come flying off! :) Yes, you can play online w/ voice chat, which isn't a big deal to somepeople. Just turn the sound down, haha! This is not a bad game for children 10 or higher. If you keep the gore off its a rated "T" game easy.
Great game but is very gory. However, the game becomes appropriate for children 10 and up with the gore filter on. That is the only reason I got the game. This is a good M rated game to start with for kids. Overall a great game and I highly recommend it.