The Atari ST emulator
This is Hatari. I’ve configured Advanced Launcher to switch the SHIELD to 50Hz refresh rate if your TV supports it. This matches the PAL refresh rate of most Atari ST games and leads to perfect smooth scrolling.

A:          Fire
Y:          Enter Hatari GUI
Select:     Toggle mouse mode
Start:      Toggle on screen keyboard
L trigger:  Toggle mouse and joystick status
L shoulder: Select joystick number
R shoulder: Select mouse speed
NVIDIA:     Toggle RetroArch menu

In order to use this emulator, you need to download this config file:
http://lindqvist.synology.me/shieldguide/hatari.cfg

You also need the system roms from the Atari ST. I recommend TOS version 1.04. Regardless of which TOS version you decide to use, you must name the file tos.img.

When you have the two files they should be placed in the RetroArch system folder on the SHIELD:

Hatari is compatible with disk images in the following formats:

• .st
• .stx
• .zip format (zipped .st and .stx files)

Disk images must be placed in the “atarist” rom folder on the SHIELD. You should name the files the way you want them to be listed in SPMC:

When you’ve added games to the “atarist” folder you must do a scan of the folder in Advanced Launcher:

You are now ready to play Atari ST games!