《Chain Letter》 is a grid-based control roguelite defense.

Combine your friends' skills to create your own skill build and defend against waves of demons within the designated grid.

Break through 4 stages, unlock 31 friend skills, create your own party, and engage in frantic battles.

 Key Features

• Grid-based controls: Thrilling combat where evasion and precise execution determine victory or defeat.
• Command Input Skill System: Control-centric play that activates skills by inputting key commands.
• Controls that feel good in your hand: The more you get used to it, the more you feel the pleasure of operation.
• Friend Skill Combos: Unlock 31 skills and create your own build.
• Short and fast runs: Tempo optimized for short play sessions and repetitive challenges.
• A total of 4 stages: As you progress, stronger enemies and new patterns appear.

 Sometimes powerful enemies, sometimes a barrage of reckless bullets.

In it, you must move quickly within a given grid and use skills to fend off enemies.

Each 'Friend Skill' has its own unique command, so you can feel the thrill of the controls as you get used to them.

Collect friend skills with different characteristics such as summon/consecutive hit/area of effect/buff, etc. to create your own skill combination, and even if you fail, try again to strengthen it.

Defeat the increasingly insanely powerful demons until the very end!

 The story in the game

You become the protagonist, Mongsil, who is caught up in a mysterious incident and must escape the world that repeats itself for unknown reasons.

In this hellish world, magic letters play a key role.

Letters are used to unlock friends who are locked in a curse or to enhance their skills.

Can you unlock all your friends and escape this world?

Deliver letters, unlock and upgrade your friends, and make your way through Hell!