Let me begin by saying this game is a blast. Extremely well developed, crisp, action-packed, and just plain fun. I picked the game up, and after playing a week or so went out and got a copy for my 16-year old son to play with me.
However, after putting in some hours with my son, I have to say that the ratings stating that this game is appropriate for children under the age of 12 are ill advised. Titanfall features realistic blood sprays and bone matter that splatters onto the environment when players are shot; explosions reduce players to meaty chunks, and players who are crushed under the titular Titans explode in a red mist. One 'Titan execution' style kill involves ripping a pilot from their Titan, observing them for moment, then watching as they burst in your Titan's clenched fist.
There is no filter for voice chat beyond the reactionary "mute" option that can only be used in the lobby between matches; and your fellow players will make little to no effort to censor their unending slew of profanities. What little language is used in-game pales in comparison to the slew of f- s- and even c- words that have come through voice chat in the last month or so.
In short, Titanfall brings a lot to the table. Its seamlessly integrated Titan warfare is an awesome addition to an already impressive parkour first person shooter. However, for all the incredible aspects it brings to the table, it carries all the usual pitfalls of the genre. The violence is intense, though not gratuitous, a few profanities pop up on the campaign mode, but are easily missed if you aren't listening for them. All in all, nothing I would let a 15 or 16 year old delve into, given proper discernment.
However, due to the inability to turn off, monitor, or censor voice chat, I cannot recommend it to younger audiences; innocent ears will not remain so for very long in any online game, and Titanfall is no exception.