If you want to experience the game exactly as it was released, TZX is the gold standard. Formats like .Z80 or .SNA are "snapshot" files—they capture the state of the computer's memory at a specific moment (usually right after the game has loaded). While convenient (no loading times), they strip away the experience of the loading process—the screeching sounds, the flashing borders, and the anticipation.
: Technical details on how these tape image files are structured and how they preserve data for legacy hardware. tzx download
When looking for retro games, you will encounter several file extensions: .Z80, .SNA, .TAP, and .TZX. Why should you prioritize a ? If you want to experience the game exactly