Which is a better for passing time? Tetris ,Rotmg, Minecraft, Undertale, or terria?

I would play Realm of the Mad God, Well, Because you will last on there and it takes time to build your character from the start. You can Keep going until you die, Or even play MineCraft or even Terria, You know what. Play all the games at the same time. You will last. Dont Worry.

Undertale, it will waste your time going through the pacifist route and feeling all the feels, and all that stuff!

Undertale is great! It's short for a game, too. Around 6 hours.