According to the ESRB, this game contains: Mild Violence
Parents have nothing to fear about Rez unless a pulsating avatar is something that may frighten you. Worth noting, though, is the epilepsy warning that appears upon loading the game the game contains a mesh of intense color splashes and flashing at times. Enemies consist of all that look mechanical but some resemble aquatic creatures such as fish or insects. None of the music in Rez has explicit lyrics so naturally the ride is safe, at least aurally. Music game enthusiasts of titles such as PaRappa The Rapper and Space Channel 5 will want to experience Rez for its unique art direction and pumping music.
Gamers shy of rhythm games can approach Rez easily because it doesnt require that the player possess a good sense of rhythm or pacing at all.
Fans of rhythm games such as Dance Dance Revolution may feel hindered since the experience relies more on reflexes and split decision shooting than it does moving to a beat.
Deaf and hard of hearing gamers are provided with enough visual (and vibration) feedback on where and when to shoot enemies. Since half of this game's value relies on the aural the action may become repetitive.