This is something of an errata as I don’t think I explained the Alien Weakness clearly enough.

When an enemy Exploits the Alien Weakness by sacrificing her Weapon Attributes (see Chapter Nine: Weapons) and successfully inflicts damage she inflicts 2 boxes of the appropriate Damage rather than the usual 1. If the Alien succeeds in her Damage Resistance Test she still suffers 1 box of the appropriate damage from a glancing blow.

The reason this is somewhat slapdash in the book is because the Alien Weakness went through the most revisions of all of them. An optional alternative Weakness is presented below.

When an enemy Exploit the Alien When an enemy Exploits the Alien Weakness by sacrificing her Weapon Attributes (see Chapter Nine: Weapons) and successfully inflicts Damage the Alien must also make a mark by one of her Power Levels, suspending that level from play. The highest level of a Power must be marked off first