In situations where multiple creatures are caught in an explosion, instead of making an Opposed Test for each creature in a target Zone, the GM can choose to make a single Opposed Test for all targets that have the same Reflexes (Dodge) skill, and apply any resulting Damage to all targets. This saves the GM from making multiple rolls for similar or identical creatures.
When you use a weapon with the Blast Trait to attack, target a Zone within range and make a single Ranged (Ordnance or Thrown) Test, depending on whether the weapon is a Launcher or a thrown Grenade. All characters in the target Zone must make an opposed Reflexes (Dodge) Test versus the result of your Test. If you win the Opposed Test, you deal Damage equal to your weapon Damage plus the difference in SL. This means that some characters in the target Zone may take severe damage, while others take none at all.