So ya is there a way to get all factions playable in campaign?

[Emperor Tom]

Without having to download a mod because I don't have internet for my gaming computer. Can I mod it myself?

[Arto]

Well you could just copy all the factions from the descr_strat (C:\Program Files\SEGA\Medieval II Total War\data\world\maps\campaign) file from unlockable & nonplayable to playable, but some of the nonplayable factions will not work let me help you :
Papal States - Works like a chum when you put it in the playable list
Aztecs - Push Ctrl+F, then type aztecs, click twice to search, if you did it right you'll see this
faction aztecs, balanced smith
ai_label default
undiscovered
denari 50000
denari_kings_purse 5000
settlement
Delete undiscovered
Mongols - This one is difficult, you should unpack everything first, delete dead_until_resurected(descr_strat), add a settlement(From the Rebels list), edit some other files(So that the Mongols won't resurrect), add a faction leader and some units and put it into playable list and it should work(I once tried it and it worked)
Timurids - Same as Mongols
Slave - Easier than I thought, just put it into the playable list and search for slave_faction than you should see this
faction slave, balanced smith
ai_label slave_faction
denari 5000
denari_kings_purse 500
change the ai_label from slave_faction into default, save and close

I hope I could help you

(P.S. You can also play with the Saxons and the Normans, but should I tell it to you )

[Tankfriend]

The first thing you would have to do is unpack all files of M2TW into your main folder; there's an unpacking program that comes with the patches.

You can find it here if you have the patches:

"your M2TW folder"\tools\unpacker
-> unpack_all.bat

Run the file and it will start to unpack all the data of the game into the respective directories (beware: ~7GB needed for this).

If the program is finished (it will take a while), go to

"your M2TW folder"\data\world\maps\campaign\imperial_campaign
-> descr_strat.txt

There, just cut and paste all the factions from "unlockable" and "unplayable" to "playable" and you will be able to play the respective faction in the Grand Campaign mode.
Unfortunately, there are several restrictions to this:

- Papal States: playable, but as far as I remember, neither will you be able to call for crusades yourself, nor do you have any authority to decide about other factions crusades, excommunications or reconciliations (every catholic faction you get to war with is automatically excommed though)

- Mongols and Timurids: completely unplayable, because they are not present from the beginning (you will lose the instant you start the game, if it starts at all)

- Aztecs: playable, but I somehow remember that you are stuck to America, lacking the necessary ships; or some other bug occured, I'm not sure

- Slaves: playable, but very difficult because you usually don't have lots of troops to use and your provinces are widespread; besides, you are at war with everyone

Last but not least, it should be said that this thread belongs to the modding workshop, that's the section supposed to help with modding.

Edit: ****, you beat me to it Arto...
Anyway, you added some things that I haven't got in here...

[Emperor Tom]

Thanks, I'll write this all down and try it. BTW do you know if I can make it so that rebels are never around or atleast hardly around?

[Monsieur Alphonse]

You don't have to unpack the files, descr_strat is already in the C:\Program Files\SEGA\Medieval II Total War\data\world\maps\campaign\imperial_campaign folder. To have less rebels you changer their spawn value in descr_strat to 599 or higher (probably 999 but haven't tested that).

[Emperor Tom]

Thank you guys, It worked! Except I still have trouble and can't use Mongols, trimuids, or rebels.
Oh well, atleast I got papal states...