Azathoth

Metroid Prime

I wouldn’t want to be mauled by a fearsome gonad either.

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That is a brilliant mashup.

Kingdom Death: Monster may be my biggest if we’re counting the volume of both the game box and the miniatures box. If not Twilight Imperium is big but I think the big Galaxy Trucker-and-expansion in one box is taller and might be bigger overall.

Smallest for me is probably Codenames. Unless Set counts.

The Culture and it isn’t even close.