Game Idea: Turn-Based, Multiplayer FPS (devs, feel free to use this idea)

Hi devs (and everyone else), I just had a great idea for a multiplayer game! A turn-based first person shooter! I mean turn-based in the way that Wolfenstein RPG and Doom II RPG are turn based.

Basic gameplay
Essentially, it's a death match, you against your friend or a computer. You move, pass the iPhone to your friend, then they move, etc.. This might mean slow gameplay, but you could make it so you get 3 moves per turn rather than only 1, and only 1 during fighting.

Power-ups
Health packs, syringes (injected power-ups that can be used to take up a turn), ability to pick up new weapons, ammo, etc.

Modes
Local multiplayer: Pass and play with a friend. Can play with computers or without.
Wifi multiplayer: Self-explanatory. Can play with computers or without.
Bluetooth multiplayer: Self-explanatory. Can play with computers or without.
Worldwide online multiplayer: Would be awesome. Can add computers to a match or leave them out so more people can play. Would be turn-based.
One-Player Mode: Can play against computers (up to three).
Story Mode: (one player only) A tyrannical dictator has taken over your country. Join the rebellion and fight for justice (final boss would be dictator), or join the army and fight against the rebellion (final boss would be leader of rebellion). The choice of who to join would decide the ending.
More Episodes (via In-App purchase): Need more one-player-y goodness? Buy a new episode via In-App purchase for more missions, minigames, and multiple story modes. Each episode would come with up to 3 new characters, 5 new weapons, 1 new arena, a few missions, 1 minigame, and one alternate story mode. Also, more obstacles, buildings, etc. to use in the arena creator would be included.
Zombie Horde Mode: 1 - 4 players band together to see how long they can survive against hordes of zombies (endless).

Arenas
Warehouse: Can kick open some boxes (inside are powerups or animals).
The Docks: Can kick opponent into the water if they are on the edge
The Mall: Money can be found on the ground and then can be used to purchase powerups inside shops.
(unlockable) Nazi base: Is unlocked when Nazi soldier is unlocked. Syringes can be created at medicine machines if the player has an empty syringe.
(unlockable) American base: Weapons can be found in weapon cabinets.
(unlockable) Graveyard: Zombies enemies rise up out of the ground and attack all players. Is unlocked when 10 hordes are defeated in Zombie Horde mode.
(unlockable) Blimp: Flying in the air. Can kick opponent off the blimp if they are on the edge.
(unlockable) Arena Creator: Create your own arena! Find objects in story mode to use in the arena creator. You can save your level in 3 slots, and you can upload the level to the internet for others to download or to play in Online-Multiplayer.

Characters
Scientist: +25 to all syringes.
Escaped Experiment: +25 damage (for weapon attacks).
Male protagonist: Carries a gun no one else can carry.
Female protagonist: Carries a gun no one else can carry.
(unlockable) Nazi soldier: +25 speed.
(unlockable) American soldier: +50 when using a syringe that brings up your strength.
(unlockable) Zombie: Carries a chainsaw. Is unlocked when 50 zombie hordes are defeated in Zombie Horde mode.

The game would play just like Wolfenstein RPG. Devs feel free to use this idea (and please do!)

 

Thanks! I thought about it, but never got around to learning Objective-C.

 

I understand that some of the things I put in the idea would be pretty hard to implement, but not impossible.

 

Updated