Nintendo Support: How to Start a Game (NES Classic Edition)
Nintendo Switch Online Expansion Pack games list | AllGamers
Along with the Official 20 Games list for NES Games, other games can be seen upcoming in the following Months(Three per Month it Seems) : r/NintendoSwitch
Nintendo Switch Online - Price, Trial, Free SNES and NES Games List September 2019 | USgamer
Retro NES 620 Game List (2) | ThrivingLocally
Top 100 NES Games - IGN.com
Ranking The 10 Best NES Games On Nintendo Switch Online