How much did the GC version sell in total?
Worldwide?
GC: 1,600,000
PS2: 2,200,000
Wii: 1,900,000
An important question to ask is "How much did the pre-release announcement of the PS2 version of RE4 hurt GCN RE4 sales?," though.
Now, there was never any question that the game could sell more on PS2 than GCN, but the pre-release announcement still goes down in infamy as a total blockheaded move by Capcom. Regardless, the port to PS2 was never because the GCN version sold poorly and Capcom needed to make back the budget.
The last official tie-in ratio we got was 8.8, almost 3 years ago.
That was an NPD tie ratio. We've never gotten a worldwide tie ratio for 360 (at least that I've seen).
Also, how do pack-ins work on NPD? Does it only count official pack-ins included in the box? If Best Buy decided to give you 3 free games with your 360 (as they often do, at least in Canada), do those three games count as individual software sales or pack-ins on NPD?
If it's included in the box by the manufacturer, it's listed as a separate line in the hardware results to subscribers. It's not included in their publicly reported software numbers, though. If a retailer makes a bundle, then it's included by NPD in the software sales.
PSP version outsold 3DS KH even here,
225 > 225?
Okay!