Retro gaming product pages can become a wall of acronyms. This glossary gives plain-language definitions so you can understand what a console description is actually promising.
Emulator
Software that reproduces enough behavior of another game system for compatible software to run. Accuracy and performance vary by emulator, hardware and individual title.
ROM or game image
A digital copy of software data originally stored on a cartridge, disc or other medium. Copyright and distribution rights still apply; owning a device does not automatically grant the right to download or redistribute copyrighted game files.
Firmware
Low-level software or a system image that controls how the device boots, presents its interface and interacts with hardware. Firmware versions can change compatibility or menu behavior.
Save state
A snapshot of emulator state that can resume a game from a specific moment. It is different from the game’s original battery-backed or memory-card save system and may not be portable between emulator versions.
Input lag
The time between pressing a control and seeing the result on screen. Controller connection, emulator settings, display processing and the game itself can all contribute.
Aspect ratio
The relationship between image width and height. Many classic games were designed for 4:3 displays; most modern televisions are 16:9.
Compare setup styles in our Retro Gaming Guides, or check the live G11 Pro product page for current storage, price and verified box contents.