From We Got This Covered:
'What some may not know is the fact that Dead Island is actually part role-playing game. This means that it has an emphasis on weapon statistics and a bar which measures stamina. Swinging your weapon too many times in a row can result in a tiring effect, which means that players must be smart in the way that they approach each melee combat moment with the walking flesheaters. Unfortunately, these walking corpses are on vacation with you, though that doesn’t mean that they want to lounge and soak up the sun on the sandy beaches. They still want brains and, well, more is always better. Right?'