Godot Engine

Commercial game engine licensing hangs over independent developers. Unity's 2023 announcement of per-install fees shook the industry before being withdrawn and revised, and Unreal takes royalties above a revenue threshold. Terms you accepted casually matter enormously once a project earns money.

Godot's terms are one sentence: MIT, use it however you like. 115,706 stars. Whatever your game earns is unrelated to the engine — no reporting, no revenue share, no licence fee, and you may even modify the engine and sell that.

Technically:

• Its 2D is genuinely 2D. Many engines implement 2D as an orthographic camera in a 3D world; Godot has a separate 2D rendering pipeline with pixel-based coordinates, which is more intuitive and performs better for pixel and 2D projects. This is its most praised advantage.
• Nodes and scenes. Everything is a node, nodes compose scenes, and scenes nest and are reused. The structure is quick to learn and keeps complex projects legible.
• GDScript, its own scripting language with Python-like syntax and deep engine integration, which is fast to write. C# is available, and GDExtension allows C++ or Rust.
• The editor is itself built in Godot — a download of a few tens of megabytes that starts quickly and needs no installation; unzip and run.
• 3D improved substantially in 4.x with global illumination, volumetric fog and a more modern pipeline. Still behind Unreal, but sufficient for small and mid-sized 3D work.

To be clear about:

• 3D still trails Unreal and Unity in rendering quality, tooling maturity and the volume of ready-made assets and plugins. For large photorealistic 3D projects, Godot is not currently the best answer. For 2D, stylized smaller 3D and indie games, it fits very well.
• The ecosystem is smaller than Unity's. Tutorials, plugins and asset stores are not comparable in scale, so searches turn up fewer answers — though the community is growing quickly.
• Console export requires third parties. Nintendo, Sony and Microsoft platforms involve their own SDKs and non-disclosure agreements that Godot cannot ship directly, so console builds go through third-party providers. Investigate that path before committing to a console release.
• Mobile export needs signing configuration and the usual pile of platform-specific details, as with any engine.

Who it suits: independent developers, anyone making 2D games, students learning game development, and anyone who would rather an engine vendor not take a share of their income.