Merge Smith - Weapon Upgrade is a free idle merge game developed by MoviSoft Co. Ltd. In this game, you take on the role of a blacksmith and merge weapons to earn goods. The goal is to create legendary weapons and become the best blacksmith.

The gameplay revolves around combining two identical weapons to create a higher-class weapon. As you progress, you can create various types of weapons, from awls to axes, blades, bows, sticks, Holy swords, and Dark Blades. Higher-grade weapons generate more money, allowing you to upgrade your blacksmith and various other aspects of the game.

One of the unique features of Merge Smith - Weapon Upgrade is its idle gameplay. Even if you're not actively playing, the weapons you've created will continue to earn goods. This makes it a great game to play during your downtime or while taking a break from your daily life.

The game also offers treasure boxes that are generated every hour, which can accelerate the production and reinforcement of weapons. Additionally, there are regular bonuses that you can claim by attending the game.

Overall, Merge Smith - Weapon Upgrade is an engaging idle merge game that offers a sense of accomplishment as you create and upgrade various weapons. Whether you're a fan of clicker games or enjoy the satisfaction of merging items, this game provides an enjoyable experience.