The Settlers (Serf City: Life is Feudal in the United States) is a slow-paced simulation video game by German developer Blue Byte Software, first released in 1993 for Commodore Amiga and in 1994 for the IBM-PC. It was the first game of its type, blending together principles which had not been seen in a single game before, and defined the line of the later Settlers games. On the hardware available at the time, the game could control a maximum of 64,000 individuals, all behaving autonomously.
The Settlers III is a real-time strategyvideo game developed by Blue Byte Software, being the second sequel to The Settlers. This isometric city-building game was released on November 30, 1998. The most notable difference between this game and its two predecessors is that there are no more roads—all units, including carriers with goods, can walk around freely. This simplifies the building of a settlement, since only the distances between buildings are relevant, and not how roads can be constructed between them. Military units are now directly controlled, making fighting more similar to games like Command & Conquer or Age of Empires, than to the previous Settlers games. Settlers III was also famous for its peculiar copy protection: in pirated versions of the game, iron smelters would only produce pigs instead of iron, which made weapon production impossible. 
The Settlers IV is a real-time strategyvideo game developed by Blue Byte Software, being the third sequel to The Settlers. In The Settlers IV there are four playable races: the Mayans, the Vikings, the Romans, and the Trojans (the Trojans were only available after installing the expansion The Settlers IV: The Trojans and the Elixir of Power). There was also a NPC-only race, called the Dark Tribe. The game can be played via either single-player, playing against the computer, or against another human opponent, via multiplayer, and features a "free settle" mode where players are free to build a civilization with no fear of attack. The game is also available for iPhone and iPod Touch under the name "The Settlers", with free and pay versions available. Although the title is different, the game is much the same, but using the iPhone's touch controls.
The Settlers: Heritage of Kings (also known unofficially as The Settlers V) is the fifth instalment of The Settlers series of Real Time Strategy games on the PC. Heritage of Kings breaks off from the typical pattern that Settlers games have followed since they began: while the concept of the game remains, in essence, the same, a lot of the gameplay features have changed from those of The Settlers IV, and slightly resemble many of the gameplay aspects displayed in the game Cossacks: European Wars. Despite this, Heritage of Kings still maintains many of the characteristics of classic Settlers gameplay.
The Settlers II 10th Anniversary Edition is a remake of the classic real-time strategy game The Settlers II. It was announced in July 2006. The Settlers II 10th Anniversary Edition features up-to-date 3D graphics and new gameplay additions. The game was released in Germany in September 2006 and in the UK in October 2006. An English-language version was also available in various other regions, including Scandinavia and Asia. The game was not released in North America.
The Settlers: Rise of an Empire, a real-time strategy game, is the sixth game in The Settlers series. It was developed by Blue Byte and published by UbiSoft, with a US release date of September 25, 2007, a European release date of September 28, and an Australian release date of September 30. A Limited Edition is also available, containing additional in-game content (including statues and a pavilion), an art book, bonus DVD, original soundtrack, technology tree sheet, and a demo CD.