Switch's Monthly Free Games are only playable for the month. You don't keep them.

[mysteryman]

Bandorr said:

mysteryman said:
You don't keep the 'free' games on ps+/xblive either. They're all rentals.

You "Keep" them until you stop paying for them. You don't keep the Nintendo game no matter what (unless you actually buy it).

Also to the @OP title is wrong. It is Free Game. One game.  You get one NES or one SNES game.

You do realise that is renting, right?