A simple plugin to answer SO question https://stackoverflow.com/questions/28966185/reverse-all-line-of-text-in-sublime-text
I have only tested this with Sublime Text 3.
The only install option right now is by using git.
So open Sublime Text and click:
Perferences -> Browse Packages
And from there you can run the follow line from the command prompt (given that git is install and available in your environment at that time):
git clone https://github.com/MattSeen/ST_ReverseCharacters
Using multiple cursors highlight the different lines of text you want to reverse and then open the command palette and use the command:
Reverse characters in selected section