condition || condition || condition

##</code><code>##

if ($genres[0] eq 'Science Fiction' || $genres[0] eq 'Sci-Fi' || or $genres[0] eq 'Fantasy') {

##</code><code>##

# Either
if ($genres[0] =~ /^ (?: Science\ Fiction | Sci-Fi | Fantasy ) $/x) {

# or
if (grep $genres[0] eq $_, 'Science Fiction', 'Sci-Fi', 'Fantasy') {