Ironically, Nintendo won the legal war but lost the cultural war. Today, the only way to play hundreds of authentic NES games legally is through (which offers a paltry fraction of the 200-in-1's library) or paid emulation.
A genuine 200 distinct games were impossible due to ROM size constraints. Instead, engineers employed three primary techniques: simple repetition (e.g., Super Mario Bros. listed 20 times with altered starting levels), pseudo-games (single-screen hacks or “infinite life” variants), and trainer menus (selecting power-ups before starting). Consequently, an average 200-in-1 contained roughly 45 unique titles, with the remaining 155 acting as filler. 200 in 1 game