Acronis 2012 and new Windows 8 computer

If you want to install a version on Win8 then the compatible versions starts from TI 2013 up.
https://kb.acronis.com/content/31033

Anyway you can also use your v2012 boot disk if you made one when you had it installed? ..you don't have to install 2012 on Windows 8, however you surly can use use its boot disk and do the things you need to that way, using a 2012 and earlier 'boot disk' will boot on Win8, I do it all the time. You don't need to install into windows to get your files and copy them out is my point. As long as you can connect to the drives you have your backup images on, you can get to them via the boot disk via a working OS.

I just have the .tib files on an external. Can you point me to an actual download? Will I have to purchase Acronis 2014/

Downloads are available at Acronis Home Page if you want them.
Point is if all you want is to get to your previous files off that .tib you made, then you don't really need to install or buy anything newer if you don't want, you can use whatever your True Image version was that you made the image with, and use its boot disk for access as long as you made one? or if you didn't but you have the original CD that you installed True Image with, then you can use that as a boot disk as well.

You have your previous .tib on an external is great, I imagine it's usb yes, and so all you simply need to access that particular .tib is at minimum use the same version number of True Image that you created the .tibs with (or any version Newer will as well; newer access's older but not the other way around) Did you make a 'boot disk' with your previous version v2012?

All you do is plug in your external into the usb port of a working computer, put your True Image 2012 boot disk in the CD Drive and turn on your computer, without installing or gong into Windows, it will boot True Image up, and as you browse to it will let you access your USB external drive, you then browse that to whatever particular .tib you have and want to open and do so, and depending on what you want to do with it, you have plenty of options to get whatever it was you need, from restoring individual files and folders, etc, depending.

You can boot all the earlier versions of True Image versions on Windows 8, you just can't install any of them until v2013 is what I was saying. You can even use those earlier versions as a boot disk (not installing) and from their boot environment still create/restore Windows 8 images, I do that all the time; or restore individual files/folders from a previous version .tib into an appropriate folder on your Windows 8 installation, or one of its partitions if available.