Godot Engine - Feature-packed 2D and 3D open source game engine.
codebeat - Automated code review for Swift
Unity - The multiplatform game creation tools for everyone.
CodeStream - CodeStream helps development teams resolve issues faster, and improve code quality by streamlining code reviews inside your IDE
GDevelop - GDevelop is an open-source game making software designed to be used by everyone.
Codacy - Automatically reviews code style, security, duplication, complexity, and coverage on every change while tracking code quality throughout your sprints.