"Dynasty Warriors 4: Xtreme Legends (真・三國無双3 猛将伝, Shin Sangokumusou 3 Moushouden) is a PlayStation 2 Dynasty Warriors 4 expansion developed by Omega Force and published by Koei. DW4XL, as it is sometimes abbreviated to, has slightly improved weather effects and character reflections within the overall graphics. The original DW4 game disc is needed if the player wishes to play external modes such as 'Musou Mode.'
The expansion adds new difficulty levels and new modes of play."
Source: Wikipedia, "Dynasty_Warriors_4", available under the CC-BY-SA License.