What you need:
1. DosBox Turbo and DosBox Manager
2. A DOS visual novel
3. Some basic knowledge of cmd
How to install:
1 – Download and install DosBox Turbo and DosBox Manager from the Google Play market. (It’s quite cheap at less than $3)
2 – Download a DOS visual novel (you can find some here: http://sakurasoftfan.narod.ru/download.html)
3 – Extract the game’s folder into your Android device’s sdcard “dosbox” folder. For this tutorial, I’ll be using Runaway City as an example. Apply the same rules if you plan to install other DOS visual novels.
4 – In the DosBox Manager menu,create a new profile and name it “Runaway City”.
5 – Press and hold on the renamed icon, then click on “Edit Config”. Then in that menu, go to “DosBox Settings”.
6 – Then go to “Autoexec” menu and click on it.
7 – Here’s the toughest part; you will need some experience in running DosBox on Windows or Mac. Mount c:/ as your sdcard, change directory to your “dosbox” folder, cd into the folder that contains Runaway City, then run the .exe file. This guide will benefit you greatly: http://www.dosbox.com/wiki/Commands
8 – Adjust other settings according to your phone / tablet’s specs. Set Audio Freq Rate to 16000 Hz, any higher will cause the sfx to produce cracking sounds.
9 – Enjoy! Like I said before, this hack is pretty difficult to get it right the first time. Even I have problems writing this tutorial.