I was just looking at Board Game Geek, and got a vague idea for a persistent CCG that could be played as a browser MMO. You'd control a city in which you can place structure cards. These cards will generate resources every turn. Every day, you'll draw a new hand of cards, that can be placed using these resources. Some of these cards will be additional buildings (which can also have their own effects), and others will be unit cards, representing your military.

Just thought I'd share the final functions I settled on for isometric coordinate calculations. Unlike most of the others I've seen around the web, these account for:
* Origin offset
* Tile-based position offset
* Varied scale
* Any aspect ratio (not just 2:1)

An idea for a civ-like game has been banging around in my head for a while, and I wanted to put some ideas down. The layered node structure I've been working on gave me the idea, as I thought it would apply very well to a game that takes place on multiple levels of scale.

While ZedZed required only simple directional pathfinding (zombies are stupid, so advanced pathfinding is not needed), Demon Keeper required some more advanced techniques to facilitate targeting.