Ben 10
39 Achievements
1,000
6-8h
Xbox One
Xbox Series
...at the Speed of Sound
You've flattened 6 enemies with a single Cannonbolt roll!
50
32.2%
How to unlock the ...at the Speed of Sound achievement in Ben 10 - Definitive Guide
The best way to do this one is having Grey Matter use his ability () to regroup as many enemies as possible where the target is. Then, switch fast to Cannonball and use his ability () to roll on the grouped enemies.
You should be full of energy to launch both attacks.
Found a video on YouTube that explains it better.
You should be full of energy to launch both attacks.
Found a video on YouTube that explains it better.
Cannonbolt's ability is where he turns into a ball and rolls across the screen, damaging enemies in his path. For this trophy you must kill 5 enemies with a single roll. You will want to aim for smaller, weaker enemies like the jack in the box and bee enemies as it more likely you will kill them with the ability attack.
The easiest way to attempt this is to first use Grey Matter's vortex ability to group a bunch of enemies together, then switch to Cannonbolt and do his roll ability at the grouping. Once you do a roll where you kill 5 enemies during it, the trophy will pop.
Video Guide