Here's how to beat the squid. Buy Quake and dump your spare points into it. At the fight take over all the houses/towers/crystals. Then quake the squid till he's 0. Send in your troops to the main tentacle to clear a path to the head. Make sure you're fast and agile too.
 "Civilizations Wars"){kind=icon}
 "Robot Dinosaurs That Shoot Beams When They Roar"){kind=icon}
 "Vox Populi, Vox Dei(a werewolf thriller)"){kind=icon}
 "Maverick"){kind=icon}