71%Strong matchSealChain: Call of Blood
60%59760% positive reviews, Mixed across 597 reviews·Roguelike · Lovecraftian
—







《Chain Letter》 is a grid-based control roguelite defense game. Unlock and combine friend skills with unique commands to build your own setup and hold back the oncoming demons.
Chain Letter
SteamCombine friend skills to complete your own skill build, and hold back waves of demons within a fixed grid.
Clear 4 stages and unlock 31 friend skills to form your own party—then dive into this chaotic battle!


In the chaos, you must move quickly within the grid and use your skills to hold the line.
Each “friend skill” has its own unique command, and the more you get used to the controls, the more satisfying it feels.
Gather different types of skills (summons, rapid strikes, AoE, buffs) create your own combinations, and even if you fail, try again and grow stronger.
Defeat the demons that keep surging in, all the way to the end!

You play as the protagonist “Mongsil,” caught in a mysterious incident, and must escape a world that repeats for unknown reasons.
In this hellish world, a magical letter is the key element.
The letter is used to unlock friends sealed by a curse, or to strengthen skills.
Can you unlock every friend and escape this world?
Deliver the letter, unlock and upgrade your friends, and push toward the exit from hell!
Steam data © 2026 Valve Corporation. Trademarks are property of their respective owners.
All matches
Finding similar games…
SealChain: Call of BloodShares Action Roguelike · Roguelite · Pixel Graphics , adds Lovecraftian60% · 597 positive reviews71%Strong match—
LoopstructorShares Roguelite · Top-Down · 2D , adds Tower Defense82% · 318 positive reviews64%Good match—
Chained TogetherShares Casual · Indie , adds Puzzle Platformer90% · 64k positive reviews68%Strong match—
Apocalypse PartyShares Action Roguelike · Roguelite · Top-Down , adds Online Co-Op73% · 5k positive reviews60%Good match—
Runic SurvivorShares Action Roguelike · Roguelite · Pixel Graphics , adds Action RPG67% · 222 positive reviews58%Good match—
Letter Quest: Grimm's JourneyShares Indie · Casual , adds Word Game96% · 211 positive reviews65%Strong match—All matches
The best games like Chain Letter are SealChain: Call of Blood, Loopstructor, Chained Together, Apocalypse Party, and Runic Survivor.
Match on: filter matches for Chain Letter by tag
Filters all matches
65%+Strong matches
50%+Good matches