Defensor

Defensor would be a game for all current platforms that would be a hybrid of the hack and slash, shooter, and tower defense game genres. It would be inspired by games like Sanctum and Plants VS. Zombies, in which the goal is to keep an enemy force from reaching a certain point. This has always been one of my favorite concepts for a game, but I find its rarely executed in a way I really appreciate - I always find myself wishing that there were a tower-defense game something more like Dynasty Warriors, set on a large map with lots of different terrain elements where you could play as incredibly strong characters in over-the-top, immersive action while still bearing the larger battle in mind.

This game would have a style you might call a cross between cartoony, lightly cel-shaded, Shonen Jump-style action and a blockbuster movie. It would also not be very story-driven at all, and so wouldn't be confined to a single theme - the player would have a choice of everything from a sci-fi setting with space ships and laser blasters, to a medieval fantasy setting with longbows, horses, and castles, to a zombie apocalypse.

Gameplay
As I implied earlier, this game would include both elements of a shooter and a straight-up melee battle game. Considering that it would incorporate various types of warfare, it would also include various types of gameplay. For example, it would incorporate third person for sword and shield combat, first person for shooter combat, and so on.

Of course, though, there would be a key tactical element to battle in this game, because half the battle is keeping the larger layout in mind. Before the battle begins, both sides will have a few moments to set up defenses, such as barricades, guardian beasts, turrets, troops, and so on. However, these are simply what each side starts out with; throughout the battle, you can implement other defenses as well if your previous ones fall.