Bring back the tactile joy of physical media for your digital PC games. In our latest guide, we upgrade our custom RFID game launcher using a Raspberry Pi Pico and an RC522 module to continuously read NFC-tagged 3D-printed cartridges. Learn how SPI communication between the Pico and RC522 relays unique cartridge IDs to a Python desktop app—allowing you to insert a cartridge to instantly launch Steam games or music, and pull it out to pause playback.