Battlefield 2 vs Europa Universalis II
Battlefield 2
Battlefield 2 is one of the Battlefield classics and rightly so. The game lets you play as a soldier in one of the three major military superpowers: the United States, the Chinese or the newly-formed Middle East Coalition. Players will have access to a wide range of weaponry to do battle with as well as a variety of vehicles. Similar to the original game, the game has a large-scale multiplayer mode - the hallmark of any game from the main Battlefield series - that can accomodate up to 64 players on a single map.With more weapons and vehicles for you to play with, Battlefield 2 is a pretty nice sequel to the Battlefield franchise. However, considering that it has not yet been reworked, unlike the first Battlefield, and that currently, there is no way you can purchase the game unless you get the hard copy off eBay or a similar site, you might be better off buying any of the other Battlefield games.
Europa Universalis II
Europa Universalis II is what many have deemed as the best sequel to Europa Universalis. Set during the period where the hundred-year war occured, you'll need to lead your country's expansion and guide the growth of its domestic and foreign policies, while engaging in religious battles and sending expeditions to beat the competition and claim large swathes of the new world. Similar to the original game, you'll get to, depending on your decisions, interact with historical figures and momentous events (some of which though are special, random events).However, this time around, the game has a revamped and frankly much improved system for diplomacy, trade, military and overall country development. You can even demand tribute or knock out deals in order to make peace with a foreign nation. As religion is often the cause of war, this aspect has been greatly expanded in Europa Universalis II, requiring you to actually deal with cultural differences between nations of different religions.
In some way, Europa Universalis II managed to not only build on the game design used in the first game; it has also introduced a series of new features of its own. This is exactly why the game has gotten critical acclaimation from both fans and critics alike back when it was first released. So, if you love grand strategy games, you'll want to check this game out.