His own uncompromising commitment to the values of the kingdom and his solidarity with the victims of society made him an enemy of the powers - that - be. (religion-online.org)
Which makes the enemies stronger; it also shakes up the enemy waves to provide a greater challenge. (thisisxbox.com)
It's an issue that could have been balanced by making the enemies faster and more aggressive; sadly there's little evidence of this having taken place. (thatvideogameblog.com)