Criei um aplicativo CodeIgniter e agora estou tentando redirecionar os URLs com index.php para URLs sem ele.

Meu .htaccess atual é:

RewriteEngine On
RewriteBase /

# Removes trailing slashes (prevents SEO duplicate content issues)
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.+)/$ $1 [L,R=301]

# Enforce www
# If you have subdomains, you can add them to 
# the list using the "|" (OR) regex operator
RewriteCond %{HTTP_HOST} !^(www|subdomain) [NC]
RewriteRule ^(.*)$ http://www.plugb.com/$1 [L,R=301]

# Checks to see if the user is attempting to access a valid file,
# such as an image or css document, if this isn't true it sends the
# request to index.php
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php/$1 [L]

O único problema é que a mesma página está acessível com e sem o index.php.

Por exemplo:

http://www.plugb.com/index.php/games/adventure-rpg

e

http://www.plugb.com/games/adventure-rpg

Existe uma maneira de redirecionar os URLs index.php?

Obrigado Gabriel.