I based Alice Unreal on the Alice in Wonderland theme, focusing on not only creating a large asymetrical map with balanced and fun gameplay, but also integrating the Wonderland theme into the artwork and game type.
I created nearly all the environment textures and props to match the theme. Air vents from chimneys and storm drains acted as jump pads and helped improve the illusion that the map takes place in a small city.
I scripted a new game mode that involved Drink Me potions, which would randomly change the players' characters between three sizes - tiny, giant, and normal. Doors with swirling effects throughout the level acted as teleporters, with tiny doors giving smaller players some advantage to offset their slower speed. The largest players, while able to move much faster and reach higher areas in a single jump, could not use teleporters and their size made them excellent targets.
The level geometry consists of a lot of odd angles created in BSP, and when combined with the large open space this caused difficulty in optimization. A handful of tall building clusters helped divide the level while still giving the player a large open space.