0 A.D. vs Europa Universalis
0 A.D.
0 A.D. is a really unique game not because it is possibly one of the most well-made, open-source, historical real-time strategy games we've ever seen; the game started off as a mod for Age of Empires 2: The Age of Kings but ended up being a standalone game with its own game engine and everything. This is a pretty huge feat and puts 0 A.D. on the same level as other successful mod-turned games like Garry's Mod. However, the game may lose out a bit when it comes to popularity mainly because it's not available on Steam, which happens to be the current largest PC gaming platform, and partly because there isn't a lot of promoting from established gaming media, or marketing, even.That said, the game is incredibly impressive for an under-development and completely free game. You can play as a number of civilizations that has their own graphics and models to set them apart. There are also citizen-soldiers who like in real-life, can switch between gatheirng resources like a civilian and fighting as a soldier depending on need. Unlike certain RTS games that allow you to unlock every branch of the tech tree, this game offers technological tradeoffs between two equally important tech, forcing you to really consider your choices and pick one that fits your play style.
0 A.D. also tries to be as historically accurate as possible, conforming its 3D models and maps to actual historical depictions of the people and land back in the day. The effort into making game realistic is astounding, but of course, the devs have mentioned that if they had to choose between having a feature that's historically accurate or playable, they will definitely choose playable every time... naturally, since this is still mainly a game and all.
So, if you're interested, know that you can get the game for free on their site.
Europa Universalis
Europa Universalis is a historical real-time grand strategy game that includes all aspects of world history in the Early Modern Europe era, a period of time between the end of the Middle Ages and the beginning of the Industrial Revolution. Due to the game's meticulous need to be accurate in its historical accounts (period monarchs, known military leaders, and technological advancements), the game can, in some way, be doubled as an educational game since you can learn quite a lot simply by playing it.That said, the gameplay in Europa Universalis is just incredible for its time. The game is played on a huge world map that is divided into around 1,500 provinces where you can literally govern your nation the way you like. You can get involved in your nation's colonization efforts, explore new lands, trade with neighboring countries, wage war when they renegade on that very trade deal, spread the religion you've adopted far and wide, and of course, navigate the tricky political waters of diplomacy.
Not to mention, instead of using a turn-based format, the game has opted for a pauseable real-time format, so you can pause the game, issues orders and plan out strategies, before unpausing the game and let the world events play out. There are even tons of historically-based missions and events which may affect the world based on your actions and decisions.
When it comes to grand strategy games, there are only a handful that truly embodies the genre, and obviously, Europa Universalis is one of them. However, being the original game in the franchise, the graphics might be a bit worn for wear, but if you don't really mind, you can definitely pick this game up from GoG.com.