What game(s) is(are) nogalistic to you?

For me, Freerealms definitely sparked happiness in my childhood because of how fun it was. Sadly it shut down because SOE is literally a piece of shit.
Then there was Faunasphere but that got way too P2W and died. Also there was Dizzywood, but that gradually became P2P and died shortly after.

Wizard101, Maplestory and Mabinogi, three surviving games, definitely made up a majority of my childhood.

GMOD is pretty nostalgic and the older GTA games like San Andreas