GridSpace is a top-down angled 3D arcade game that will aim to be more action oriented than other games of this kind (like Geometry Wars). It will hopefully have some RPG-like mechanics of being able to upgrade and customize your ship and weapon loadout, as well as explore the large grid space world. It is being made in the Blender Game Engine.
Purchase-able upgrades in the Shop will display their properties and costs when you approach them - advancing the message will display more information about the upgrade, and allow you to purchase it.