Assassin's Creed is an open-world action game series from Ubisoft. In these sandbox games, you play as a master assassin who's an expert at parkour. 

Using a range of stealth skills, fighting expertise, and free-running, you take out a series of targets in cities packed with NPCs, often blending into the crowd to approach your target. 

While the series started with those focuses, it has morphed and changed over the years. The most recent Assassin's Creed games have been RPG games with a focus on dialogue options and level-up statistics.

One of the key features of Assassin's Creed is how it changes characters and settings for each game. In one game you might be playing as an Ancient Egyptian, and in the next, you might take control of a Viking in England. 

There are also sections where you play as a character in the modern day, who uses a machine called the Animus to access the memories of their ancestors. It is this narrative tool that allows the game to jump around and show different viewpoints on its Templars versus Assassins war. 

Speaking of viewpoints, the Assassin's Creed series also popularised those - towers dotted across the open map that reveal more of your surroundings once scaled.