Conversation so far:
What was Slayer's greatest accomplishment from 1988-1993?
South of Heaven received mixed responses from both fans and critics, although it was Slayer's most commercially successful release at the time.
What controversy was mentioned during this time?
AllMusic citing the album as "disturbing and powerful," and Kim Nelly of Rolling Stone calling it "genuinely offensive satanic drivel..
Did their popularity grow as much as other metal bands?
Slayer returned as a live act in September 1990 to co-headline the European Clash of the Titans tour with Megadeth, Suicidal Tendencies, and Testament.

Question: Any other important bands that they toured with?
Self-contained rewrite: Other than Megadeth, Suicidal Tendencies and Testament, were there any other important bands that Slayer toured with?