Rating based in PEGI (Pan European Game Information) rating, which labels the games based in their content and suitability in terms of protection of minors. More info here: [link]
16+ - Violence or sexual activity reaches a stage that looks the same as would be expected in real life. Usage of bad language, tobacco and drugs or criminal activities.
I'm using PEGI instead of ESRB 'cause I'm european and I'm more familiarized with these labels.
You can download the PSD file where you'll find the labels +3, +7, +12 and +18. You can upload them to your gallery and use them freely.
Only subscribers can use stamps. Copy the thumb code and paste it on your journal/shoutboard.
It's actually very attractive.