I've started developing a new game based on these ideas:
It will be an above view shooter within a large, sandbox city. The city will be a perfect square, which is divided into nine "zones" like this:
1 | 2 | 3
4 | 5 | 6
7 | 8 | 9
Each "zone" is a tile based map 32 tiles square. Each of the zones have several alternatives, and a random one is selected at the start of the game. This means that it should be a completely different city each time you play.
The aim of the game is this: You're character is a gun-for-hire, and you will be given a target to kill every round in a random zone other than your own. The target will have a gang protecting him, which increases in size as the game progresses, with better weapons to fight you. Upon killing your target, you will earn money to spend on better weaponry, body armor and first aid from street-side vendors.
I am hoping to include vehicles, which will add car chases to the game, and maybe even police (but that may have to wait for the sequel).
The interface should be similar to GTA II, with 3D (ish) buildings but a flat game world. All I have done so far is build the basic engine for the rendering of the game world, and a simple map editor to build city zones in. It can also do different ground textures, but I haven't included that in the editor yet so I can't make a map with it. Here is my current progress.
This thread is to show examples of things I do when I do them to get feedback for improvements and bugs. I'll probably be asking for you to make some maps too.
I've probably forgotten something...