The Pi-XO is a low cost Raspberry Pi Zero HAT. It has buttons, display, speaker and batteries for a complete portable gaming experience. It's primarily designed for use with PICO-8 games and gamedev, but can be used for other games or emulation too. The device is still under development and only a few prototypes are assambled so far. No professional production is planed, but the open hardware und software licence let you make your own board.
Check main features            
              - sound
              - multiple display options
              - display brightness control
              - GPIO functions (LED bar and vibration motors)
            
 
            - no SMD soldering
            - common components
            - widely available NiMH batteries
           
            
The simple designed PCB and the used components are easy to get and low-priced.
All development is done under cc licence.
You have some more questions? Send us an email or a twitter message.