Battlefield 2: Unlimited Action is a Battlefield 2 modification which improves upon the base game by fixing many inconsistencies and glitches that were disregarded by EA/DICE, as well as adding new content that is based upon either new ideas, or cut content that never made it to the game's release back in 2005 and the subsequent releases of the three booster/expansion packs. Other goals of this modification are to modernise the game's visuals by adding various new effects, textures and lightmaps; to expand the co-op and singleplayer experience by adding bot support for all map layers, and lastly, to add new and innovative content that will improve upon the general gameplay and appearance of Battlefield 2, while staying true to the game in its vanilla state. - TheObscure
I am just testing the waters with this update. Trying to see what the level of interest is in BF2 modding lately. The mod is not dead, however it isn't that much alive either. Every year I would mod for a few months and then stop. So what you see here is the current state of BF2:UA.
I am not going to list all the changes that have been made up until now, so I will rather leave it to you folks to tell me what is new.