Copied from the FAQ:

Q: How do I unlock other factions?

A: Finishing a campaign unlocks the "unlockable" factions (not Mongols, Timurids and Aztecs). Eliminating a faction in a campaign also unlocks it.

In addition, there are two ways to mod the game to unlock factions, EITHER:


Quote:
Originally Posted by Throumbaris
Open medieval2.preference.cfg and add this:

Code:
[misc]

unlock_campaign = true

OR edit the descr_strat.txt file. Delete lines number 10 and 11, ie:


Code:
end
unlockable
Q: How do I get the game to display years in stead of turns?

A: Delete the line "show_dates_as_turns" line in descr_strat.txt.


Quote:
Originally Posted by Chosun
Or you can put a ; in front of the line...

example: ;show_dates_as_turns it makes it easier to change back if you want to for any reason.