There is a MEGAPi Case and a MEGAPi Wired USB Game Controller for game players to get fluent playing experience. You can choose one of them or the two.
Features of Case:
Safe Shutdown and Safe Reset function. It will be more safe for your SD card when shutdown and reset.
This Pi case applying the most iconic element in the retro game world as a homage to the most classic console ever made.
Behind the small, hinged door, there are two USB ports and one standard RJ-45 connector. 
Put the slot for your Micro SD card on the side to allow more space for you to operate more freely.
It improves HDMI and Audio ports to enhance the experience of using your HDMI and audio out-put cables.
Features of Controller:
Classic USB Controller-M.
SWITCH: Plug and Play.
Support XINPUT, DINPUT mode and Turbo function.
Compatible with Raspberry Pi, Windows, Switch, macOS.
XINPUT(default): Hold X and plug in, only at the first time.
DINPUT: Hold Y and plug in, only at the first time.
Turbo: Hold L+SELECT+(A,B,X,Y) to turn ON/OFF this function (Turbo function for A,B,X,Y only).
Specifications:
Material: ABS
Type: Case, Controller (optional)
Item Size: 
   Case: 140 * 105 * 30mm / 5.51 * 4.13 * 1.18in
   Controller: 137 * 61 * 27mm / 5.39 * 2.4 * 1.06in
Item Weight:
   Case: 170g / 6ounces
   Controller: 136g / 4.8ounces
Package Weight:
   Case: 241g / 8.5ounces
   Controller:  158g / 5.57ounces
Package Size: 
   Case: 150 * 128 * 49mm / 5.91 * 5.04 * 1.93in
   Controller: 146 * 128 * 33mm / 5.75 * 5.04 * 1.3in
Package List:
1 * MD Case 
1 * Screwdriver
8 * Screws