Bowdlerise: The American versions of Um Jammer Lammy and PaRappa 2 went through an admirable amount of this.
In Um Jammer Lammy, the cutscene for Stage 6 was re-animated so that Lammy gets flung back through time and ends up on an exotic island, instead of dying and going to Hell. Also, the line where Yoko threatens to kill Lammy with her guitar (before she remarks that she's already dead) was removed and dubbed over.
Certain lyrics were changed too. References to the devil were changed to "a man" (Parappa's version) and "somebody" (Lammy's version) (while "The angel's been mean to me, that's for sure" became "My friend's been mean to me, that's for sure" in Parappa's version), "...so you can play in Hell" became "...so you can play in an island", "Choppin' the trees down for the fun" became "Knowin' that we're here for the fun", and "Chop all of 'em down, every single one down" became "Come on and get down, way single one down". (In PaRappa's version, "I love choppin' down trees just for fun" became "I love rockin' to the beat just for fun" and the entire "Choppin' down trees, just for fun" lyric became "Rollin' up high in the sun".)
"In the United States, the album was not released due to the commercial failure yet critical success of Um Jammer Lammy. Due to that, the album was put for download on the Internet for free, although not on iTunes or Rhapsody."