According to ESRB, this game contains: Animated Blood, Animated Violence
Parents should take note that the poor controls, convoluted puzzles, and pickyness in making certain actions occur may easily frustrate younger gamers. One other bit of strangeness for all to note is that there is a sidestepping bug which makes Indy perform the action inconsistently.
Lara Croft lovers can breathe a sigh of relief because as far as I'm concerned, she's still the reigning queen of the genre and Infernal Machine only tries to follow in her footsteps and never surpasses them.
Fans of Indiana Jones could do worse then Infernal Machine being that there haven't been too many offerings since the point & click masterpiece, Fate of Atlantis. Just make sure you bring along a control pad or joystick because playing without one is only going to make the difficult controls even worse.
Those with older computers should also take heed. Because Infernal Machine was built from an older game engine, it will run fairly well even on minimal setups. But those expecting something distinctive of the Indiana Jones name and unique as far as videogames goes will be disappointed by Infernal Machine.