Early in the pre-production cycle for AoH, I was part of the team deciding what type of game AoH would be.  I created a number of environment and game design sketches to explore possibilities in 3 lane MOBA map for iPad.  Here are a few:

Environment_06_Towers_Loooong

Environment_HUGE

Base_sketch

Environment_10_SpaceShip

Environment_07_TrailerPark

TrailerPark_Layout

Here is the final environment for our Turn Based Battle Arena:

Environment_Revamp_03

Environment_Revamp_Angles

Environment_Revamp_Exterior