Cyber Fusion Idle Merge Defend is a free idle defense game developed by PixelStorm and published by Cepter Digital. Players are trapped in a city and their only hope for survival is to build an impenetrable fortification in the coming year. Unfortunately, they don't know when the machines are going to attack.

They will have to prepare the defense using items of different types and shapes that will be built on the structure they choose. As the year progresses players will be able to defend the city and create more unique items, but their time is limited. As soon as they run out of time the AI will attack the city and destroy it.

The way to defend the city will differ according to the type of defense chosen. In “Idle defense” it will take one year for the city to be fully destroyed by the enemy. “Defend and grow” will give you more time to prepare defenses, and “Defend until zero hour” makes the AI attack as soon as the year comes to its end.

There will be 10 unique item types in the game and all of them will be produced by the players in the game. However, they will be limited in quantity, so each time the player tries to collect an item, the AI will destroy the city with a wave of attacks.

If the items are collected, it’s a good chance that they can be used to create more unique items. To protect themselves from enemies, players can build barriers, shields, and various structures.