Alien Shooter 2: Reloaded - Alien Shooter 2: Reloaded combines the elements of Role-playing, Top-down, Action, and Shooter.
Unity - The multiplatform game creation tools for everyone.
HELLDIVERS - Helldivers is an Adventure-based, Shoot em’up, Co-op, Single and Multiplayer video game developed by Arroshead Games Studios and published by Sony Computer Entertainment.
Godot Engine - Feature-packed 2D and 3D open source game engine.
Crimsonland - Crimsonland.com - a top-down shooter with a touch of RPG: gain XP, choose perks, unlock weapons, and blast your way through aliens, zombies, and lizard men. Coming soon to Steam and PS4!
Blender - Blender is the open source, cross platform suite of tools for 3D creation.