Welcome to My Nightmare received generally mixed reviews upon release.
Dave Marsh of
Rolling Stone called the album "a TV soundtrack that sounds like one. The horn parts are so corny you might imagine that you're listening to the heavy-metal
Ann-Margret." He noted the absence of the original Alice Cooper band, stating, "without the wildness and drive of the sound the Cooper troupe had, the gimmicks on which Alice the performer must rely are flat and obvious." He concluded by saying that it "is simply a synthesis of every mildly wicked, tepidly controversial trick in the Cooper handbook. But in escaping from the mask of rock singer which he claimed he found so confining, Cooper has found just another false face."
Rhino called the album "one of Cooper's most classic albums" and "iconic".
The New York Times, describing the subsequent tour, said that Cooper was much tougher than he looked in concert. Since its release,
Welcome to My Nightmare has become the most-represented album in Alice Cooper's concert setlists, accounting for, even including concerts from before its release, 15.7 percent of all the songs he has played live – a proportion which of course will be much larger counting only shows since the album's composition and release. It is the last album from which every song has been performed live, although "The Awakening" was never played until the Trash Tour on November 21, 1989; while "Some Folks" and "Escape" were never performed after the album's support tour apart from a handful of performances of the latter song in 2001. Alice started playing "Escape" again on his 2019–2020 Ol' Black Eyes Is Back Tour. ==Track listing==