Editing 4X (section)

===Combat===
Combat is an important part of 4X gameplay, because 4X games allow a player to win by exterminating all rival players, or by conquering a threshold amount of the game's universe.<ref name="gamespotSEV" /> Some 4X games, such as ''[[Galactic Civilizations]]'', resolve battles automatically, whenever two units from warring sides meet.<ref name="victory comparison" /> This is in contrast to other 4X games, such as ''[[Master of Orion]]'', that allow players to manage battles on a tactical battle screen.<ref name="victory comparison" /><ref name="colonyscreen" /> Even in 4X games with more detailed control over battles, victory is usually determined by superior numbers and technology, with battle tactics playing a smaller part.<ref name="Rausch2003a"><!--
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--></ref> 4X games differ from other combat-focused strategy games by putting more emphasis on research and economics.<ref name="Emrich1993" /><ref name="SOSA1upinterview" /> Researching new technology will grant access to new combat units. Some 4X games even allow players to research different unit components. This is more typical of space 4X games, where players may assemble a ship from a variety of engines, shields, and weaponry.<ref name="victory comparison" />