XCOM Enemy Unknown predicate as the best strategy games (and most expensive) for iOS and Android today strengthened by the presence of an expansion titled Enemy Within. Just like the PC version that was present last month November 2013, Enemy Within this version presents dozens of new features ranging from the arsenal of new weapons, two new types of combat equipment, as well as additional one enemy faction named Exalt.
Exalt itself is a mysterious organization composed of a group of people who choose to join the alien to rule the earth. Thus, besides fight deal with the aliens, in XCOM Enemy Within you will face Exalt soldiers who have military weapons like yours.
In addition to the main features that I described earlier, XCOM Enemy Within also gained a new resource called MELD. The MELD liquid you can use for the purposes of genetic research so that troops have a super power like the power of high leap, the regeneration of life, and so forth. As a small note, 2K Mobile also provide some improved graphics that supposedly will make your device work extra hard to run Enemy Within. therefore 2K Mobile recommends that you close other applications before play XCOM Enemy Within.
XCOM Enemy Within was released as a separate expansion of XCOM Enemy Unknown. This means you can play XCOM Enemy Within without having to buy a version of XCOM Enemy Unknown beforehand.
Source:
Apple's App Store: XCOM®: Enemy Within
Google Play Store: XCOM Enemy Within