Paul Spitzer has been updating the animasinteractive paradox FPS engine for flash with some great new additions and more about the engine capabilities. I think you will be blown away again by this engine.
Paul has added proximity objects which are key elements of online multiplayer games for networking (distance based messaging and events) as well as fun stuff like proximity mines as demoed. Get over there and check it out the best, quality FPS engine yet in flash continues.
The lighting, textures, effects, HUD, all look excellent.
This is in flash, a paradox indeed.