鋼鉄戦記C21

Online robot action RPG with customizable machines and planetary exploration

CyberStep, Inc. · Released Oct 14, 2020

Action Massively Multiplayer RPG Free To Play

Reviews: Mixed; 68% of 138
Recent reviews: Not enough recent
Playing now: 8; right now
Steam Deck: Unsupported
Last update: 10 months ago; Nov 6, 2025

What is 鋼鉄戦記C21?

In this free-to-play, third-person action MMORPG, you explore planets, fight enemies, and earn parts to customize your robot. You join the Neo Angel Force in its fight against the Demon Force, with online co-op and PvP available.

For you if...

+you like assembling robots with parts earned through play
+you want online co-op and PvP robot battles
+you enjoy exploring planets in an action RPG

Not for you if...

−you prefer a fixed character with little customization
−you want an offline action RPG

What players say

68% of 138 reviews are positive

Players praise the robot customization and combat. Their most common complaint is the lack of English support, which makes the Japanese-language game difficult to navigate.