First shield Achievement in Another World: 20th Anniversary Edition
Protect from lasers!
How to unlock First shield
*Story-related and can't be missed.* After escaping from the cage and picking up the gun for the first time, hold down until a SMALL blue ball forms at the tip. Release and a shield will form, unlocking this achievement. While not technically story-related, it would be hard to complete the game without using the shield. The image below shows the scene where you get the gun.