1. Download the BattleTech Advanced 3062 Installer from the link provided above.
2. Make sure you have at least 40GB free space on the drive you're installing BTA to; the launcher cache takes up roughly 25GB and the mod files themselves are about 15GB.
3. Use 7zip to open the BTAdvancedLauncher.zip file. It will contain just one file, the BTA 3062 Installer. Drag it into a storage folder (this is required as the installer creates a cache that it updates from, you'll need to keep this in a safe storage place, it needs to be somewhere on your hard drive other than in the Users directory or in the BATTLETECH game folder, put it in a storage folder elsewhere such as D:\Installer Storage).
4. Navigate to your Battletech installation folder. For Steam Users: [..]\Steam\steamapps\common\BATTLETECH
- 4a. Inside your installation folder, create a new folder called "Mods" without quotation marks
- 4b. If you already have a "Mods" folder, wipe it completely clean. Delete all files and folders within it.
- 4c. Whitelist the BATTLETECH installation folder in your anti-virus software. This is a precautionary step and may not be necessary, but some AV programs flag the critical mod files ModTekInjector.exe and QuickStart.exe as suspicious which will prevent the mod from working.
5. Run the BTA installer from your storage folder. Use its target function to point towards your newly created Mods folder. It will pop up a box asking what options you'd like to install from among the DLCs and the Community Content pack. Only select what you want from those options and only select DLC options for which you actually own the DLCs.
6. It will pop up some warnings saying "there's nothing here, is it ok to install?" Just say OK to everything and let it do its work. The first time you run the installer it'll take some time, that's normal, everything is fine. The installer automatically installs the CAB (Community Asset Bundle), you do not need a separate CAB installer.
7. Once you start the game with BTA for the first time, open up Skirmish Mechbay, this loads some assets that the game won't load otherwise. You only have to do it once after you install BTA for the first time.
8. You're done!
If you prefer videos check out this excellent comprehensive guide made by community member MangaMaD: (Note: the video is now somewhat dated and includes options like enabling Clan content which no longer exist, but the majority of it is still valid.)
Please note: Linux users will not be able to run BattleTech using the "Launch BTA 3062" button in the BTA launcher. You will have to open it through Steam or by running the BattleTech executable file.
WARNING: BTA will not work on ARM-based Macs due to their lack of a GPU. This is not possible for us to fix or do anything about, sorry in advance.
99% of players DO NOT NEED THIS. Downloading the launcher is all you need unless you are specifically directed by a BTA member to get the pre-cache to solve an issue with installation.