Kingdom Rush/YMMV


 * Goddamned Bats: Unfortunately, the nature of the game that these easily slain, frequently encountered foes actually ARE a threat, as they can come in a Zerg Rush that your towers may have a bit of difficulty handling.
 * If you are doing Iron Challenges, Warg's will cause hair loss. Since you only have 1 Health, Warg's are easily able to slip past your defences for an easy win.