Achievement: Rocket Man
Description: In Shapeshifter, kill a Monster with a Rocket Launcher
How to get:
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Step 1. Obtain a rocket launcher by power canister.
Step 2. Wait for the monster to go in monster form, to prove they are monster.
Step 3. Fire the rocket launcher directly at them, to deal as much damage as possible.
Note: This achievement is much trickier than others, due to the fact blast shield is a commonly used perk against rocket launchers and other explosions.