Overlord II
49 Achievements
1,000
35-40h
Rock On
You've killed 15 or more enemies with a single Catapult boulder Details for this achievement will be revealed once unlocked
20
How to unlock the Rock On achievement in Overlord II - Definitive Guide
just aim for smack bang in the middle of the formation and the achievment should be yours.
If not there are plenty of oppourtunities throughout the game. especially the later levels.
To use a catapult send five minions into the catapult, use the right stick to move around and then hold R2 for about three seconds to fire, up to five if you need more distance. You should get this in the prologue when you are first using the catapult. When you have to break down the barrier, hit the legion unit next to it. Bam, quick trophy. If you still don't have this by the end of the game you will get it when you are trying to get into empire city (almost) without fail. Be aware this is technically a missable trophy. So, just make sure you get this out of the way before you finish the level "Empire Hills".
You can get this easily enough in the first part of the game when you are still a child. Landing a rock in the middle of one of the formations should kill almost all of them. You’ll have plenty of chances to get this throughout the game though as there are several catapult scenes. A good tip for finding your range is to listen for the “clicks” as you wind up the catapult, count them and adjust accordingly based on where the rock lands.