Fort Roque is a fine map with it's urban design (inspired by MW2's Skidrow?) I still think it's cramped and with Marathon's high octane multiplayer matches, Fort Roque is hard to reccomend. For 2-4 players, this map is a good reccomendation for some fast multiplayer net matches. Good job.
I played a Call of Duty map that had a stair/bridge combination I thought was interesting. I loosely mimicked that structure and just sort of built things out from there. At this point the resemblance is gone, but I kept the style of an urban setting with buildings and structures positioned at regular angles.
I tried to put function over aesthetics, leaving all texturing/lighting/scenery/sounds until I was satisfied with the flow. The hill was not the initial focal point of the map, but as a player I like the variety provided by specific objectives like in KOTH, so I'm glad a natural hill area emerged. It may feel somewhat limited with no platforms, teleporters, or powerups; but I didn't want to throw everything and the kitchen sink into the same level.