So, I've spent a couple of months working on a zombie survival game with Google 3D delivering the gameworld for the player to survive in. I havent shown anyone the progress so far and I'd really love some opinions whether or not this is interesting enough to continue developing. 

The main hook of the game is that you'd basically be able to play in any city or town that has Google 3D tile data. So far I've had fun exploring London, Paris and Copenhagen and its quite interesting how familiar you become with the cities and their different landmarks. Its part zombie survival part sightseeing.   
  
The biggest issue is that the 3D tiles is one big 3D mesh with no hitboxes, which requires several invisible layers atop the 3D world to prevent the player and zombies from simply running through buildings.   
  
The game is currently able to generate a rough estimate, based on OpenStreetMap footprintdata, no matter what city is picked, but it requires a hefty loadtime. I have been able to circumvent this by saving the data as files that can be loaded, but this also means that the spawnposition is predetermined per city. There are also other layers for navigation, height maps, bullet and player tracking etc.

I've created a map editor so that I can manually tweak the building hitpoint and navigational data, but since every city has a radius of 1km from the spawn point per default, there is quite some work per map.  
  
I have attached a few clips showing the current state of the prototype. All the zombies, player and weapons are simple 3D box meshes generated in three.js and have a fairly low cost. I've been able to run the game with 500 zombies without issue. 

Currently the game has a handgun, shotgun, SMG, rifle and a flamethrower as equippable weapons. There is also a molotov cocktail and a grenade as throwables that work quite well. No sound effects however. 

I'm thinking of creating two game modes per city:   
"Surge" which is basically a vampire survivors/arcade type game mode where you try to survive as long as possible and upgrade weapons.  
"Survival" which is a more curated experience where the player has to try and reclaim part of the city while exploring and scavanging different zones that unlock as waves are cleared.

I am a bit wary of releasing the current state of the game to the public, as the Google 3D Tiles have an API cost per load. There is a certain amount that is free to use, but I'd really like to avoid surprise bills for what is currently just a hobby project :D

Currently I am also in doubt if I should keep the gameplay somewhat realistic (for instance, having to manage ammo as a ressource and mostly trying to survive by dodging zombies) or just go all in on an arcade experience. 

Would love some feedback or input! 



Zombie survival game using google 3D tiles and Three.js