Why is fallout 3 an 18

yes and fallout 3 is very suitable for people aged 10-15 . but the most important is that, mother ship zeta is okay to buy and operation anchorage , they will not effect the age rating 10-15 + if you don't want to worry about your children or whoever watching sex because there is no .in the game even though the traler says there is dating experences .that was just to make the game seem more realistic i know because i have the game and i have completed the game several times because it is so fun