Godot Engine - Feature-packed 2D and 3D open source game engine.
Pixel: ru² - Pixel: ru² is a 2D, Physics-based Puzzle-Platform, Shooter and Single-player video game by C63 Industries.
GDevelop - GDevelop is an open-source game making software designed to be used by everyone.
Rain - Sony Computer Entertainment introduces great game name as Rain is an Adventure-based Single-player video game.
Unity - The multiplatform game creation tools for everyone.
Mini Ninjas - Mini Ninjas is an Action-Adventure, Puzzle-Platform and Single-player video game developed by IO Interactive and published by Eidos Interactive.