NOTE: if the files are zipped they must be unzipped before moving to the same directory that your totala.exe is in. If you don't know how to extract files, Google is your friend ;). Link for Esacalation mod is all the way at the bottom. The All-In-One install is down there too. If you have Escalation, be sure to copy the files to both directories where the totala.exe lives.

MAPS (in order of preference: 2nd on list, TA_Features_2013.ccx, required for many 3rd party maps)

=========required maps===============
Zeal Maps
TA Features 2013
V5 map pack (1 download for all V maps... remove any maps you currently have as these might be edited and won't play if they are the old version)
===================================

Other maps that are nice to have
Rude Country
Wotan's Gift
LTA Lusch Divide II
Core Contigency Maps
Fetz Maps
Fetz vol 2 part 2 Maps
Fetz vol 2 part 1 Maps
Chrismor 5 Maps
Chrismor 1-4 Maps
CMT_Amnesia Map

PD Marathon Maps & Unit (Phreaks)
===================================

=========Alternate Map Source (use if others are down)============

Not all the above maps are available here, and it takes some looking to find those that are, but if the other links are broke then you do what you have to do ;)
TA Universe Maps
V4 maps (alternate source, link enabled only on request)
V4 maps FINAL (alternate source, link enabled only on request)
===================================

=========deprecated maps (not used anymore)===============
V1 maps FINAL
V2 maps
V3 maps FINAL
V4 maps FINAL (md5 sum: b29cc6a5a3b0f4847d14a9c1e451adab )
V4 maps FINAL, V3 Maps Final
===================================

=========Batch files for renaming V1-V4 rather than deleting them ===============

Don't delete your V1-4 map files! Move these files to your Escalation map directory and just double click to change their extensions from .ufo to .ufo~, or vice-versa. Renames the V map .ufo as well, to the opposite of the other V maps, to avoid conflicts. This makes it easy to play with those that haven't downloaded the almost 2GB V5 map pack yet. You can view these batch files by simply opening with Notepad to confirm they aren't harmful if you wish.
disable_V1-4maps.bat
enable_V1-4maps.bat

=========required extra units (OTA ONLY)============
Chris (anti-air)
The Phreaks (arm con units for core/core con uits for arm)
===================================

CAVEDOG UNITS (OTA ONLY, most already have these, some might need the CC units on the second line)
EXTRA CAVEDOG UNITS
Core Contigency Units

3.9 PATCH (install EITHER this [preferably] or the demo recorder below [if this turns out incompatible with your system])
3.9 patch forum link for instructions
3.9 patch resources
3.9 patch
hotfix for dx error (read forum for details

OLD DEMO RECORDER (install if 3.9 patch unworkable on your system: install the first then follow the README in the second to update it)
TA Demo v99b2
Ta Demo 1.0.0.545

ALL-IN-ONE (Original TA install setup with older recorder and most cavedog units. Maps will still be needed to be downloaded, and can upgrade to the 3.9 patch, though that isn't compatible with all systems)
TA-Setup2

=========required to play ESC mod (escalation mod): Installs to a new directory ("TA Escalation" within the OTA directory), and make sure to copy any maps over) Run the initial install first, then the most recent update ==================
TA ESCALATION Home Page
TA ESCALATION MOD 8.5.0
TA ESCALATION MOD 8.4.0
TA ESCALATION MOD 8.2.0 FIXED
TA ESCALATION MOD Initial Install
TA ESCALATION MOD Hot Patch(if game won't launch)
===================================