Why do people keep saying "based on userbase" and put Halo above Zelda in sales?
Based on userbase, it's Uncharted > Zelda > Halo. Wii U is currently in 2nd place.
You put Halo above Zelda in sales because the series tends to sell higher, not because of current userbase.
But with the same logic, that would mean Halo > Uncharted > Zelda. Yet people keep putting Uncharted above Halo. There's a big contradiction in logic here.