Young Souls (EP)
33 Achievements
10-12h
PS4
Top Gear
Upgrade an accessory to its maximum level
37.5%
How to unlock the Top Gear achievement in Young Souls - Definitive Guide
To buy some upgrades for accessories, you need to talk with SyIvester on the Goblin Market. Then, you need to spend some of these blue things (Guardian Tears) that is usually obtained after killing some bosses.
Here's a video (this video isn't mine, credits to JDAWG SUPREME on YT):
Here's a video (this video isn't mine, credits to JDAWG SUPREME on YT):