I see a couple of problems that use warnings; use strict; would expose right away. First,

$player_info{$ipaddr} = [ qw($nickname $userid $player_req) ];
# and...
    $player_info{$1}
        = [ qw($value1 $value2) ];
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should be

$player_info{$ipaddr} = [ $nickname, $userid, $player_req ];
# and...
    $player_info{$1}
        = [ $value1, $value2 ];
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because qw() does not interpolate the value of variables.

Second,

    while ( (my $nkey, my @nvalue) = each %player_info ) {
        #stuff
    }
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is incorrect, the second of the pair is a scalar arrayref:

    while ( (my $nkey, my $nvalue) = each %player_info ) {
        # stuff with $nvalue->[$ndx]
    }
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Sorry, I didn't follow what you were doing in that block.

After Compline,
Zaxo