Tigris & Euphrates is set in the ancient fertile crescent with players building civilizations through tile placement. Players are given four different leaders: farming, trading, religion, and government. The leaders are used to collect victory points in these same categories. However, your score at the end of the game is the number of points in your weakest category, which encourages players not to get overly specialized. Conflict arises when civilizations connect on the board, i.e., external conflicts, with only one leader of each type surviving such a conflict. Leaders can also be replaced within a civilization through internal conflicts.

25th Century Edition comes includes:

• Updated graphic design and art by Ian O’Toole
• Updated components
• 4 Advance variants – including Advanced game board, Ziggurat Expansion, Civilization Variant and buildings, and English variant