4X games often allow more complex diplomatic relations between competitors who are not on the same team.In addition to victory through conquest, 4X games often offer peaceful victory conditions or goals that involve no extermination of rival players (although war may be still be a necessary by-product of reaching said goal).
In the new millennium, several 4X releases have become critically and commercially successful.
The first 4X computer games were turn-based, but real-time 4X games are not uncommon.
Many 4X computer games were published in the mid-1990s, but were later outsold by other types of strategy games.
Emphasis is placed upon economic and technological development, as well as a range of non-military routes to supremacy.
Games can take a long time to complete since the amount of micromanagement needed to sustain an empire increases as the empire grows.Researching new technology will grant access to new combat units.