You again missing point. Ok Halo 3 and 4 are on same system, how much Halo 3 and Halo 4 would sell if instal base of Xbox 360 is 40m instead of 80m!? Definatly they would sell much less on 40m than they sold on 80m instal base, thats exatly my point when you comparing sales of Halo 5 on 23m instal base and sales of U4 on 45m instal base.

Halo 3 sold 12M on a likely 20M userbase, while Halo 4 got on 10M on likely 60M+ userbase, that is the point. They wouldn't have changed much more than perhaps 10-20% if the userbase was 40M

Halo 3 sold 12M on a likely 20M userbase, while Halo 4 got on 10M on likely 60M+ userbase, that is the point. They wouldn't have changed much more than perhaps 10-20% if the userbase was 40M

And how much would Halo 3 sold on 10m user base, how much Halo 4 would sell on 30m instal base, how much would U4 sold on instal base same like XB1 (23m), thats a point.

And how much would Halo 3 sold on 10m user base, how much Halo 4 would sell on 30m instal base, how much would U4 sold on instal base same like XB1 (23m), thats a point.

That is a completely different topic "And how much would Halo 3 sold on 10m user base,". That is shortage of Hardware and it is impossible for Halo 3 to sell more than 10 millions. But with a 500 millions user base doesn't means that the game will sell with the same proportion.

Halo 3 on a 10M userbase? Probably close to 10M. Halo 4 probably wouldn't be much affected by halfing the userbase, perhaps 8M instead of 10M, perhaps even 10M the same (most loses probably from less bundles sold). Would halo 3 sold 48M if launched on 85M userbase X360 got at end of its life? Would it have sold 120M if 200M consoles had been sold? UC4 would probably sell the same 8-10M with 23M consoles. UC1 to UC3 shows that even though the franchise got a lot better and the userbase escalated quite a bit the growth on SW sales weren't anywhere nea linear. Same with CoD, attach ratio for CoDs on the first 2 years of this gen were a lot higher than last gen, but then right now it isn't holding at the same standards. Know why? Because attach ratio decreases with more HW sales, because the lower the HW usually the more dedicated the fanbase.

That is a completely different topic "And how much would Halo 3 sold on 10m user base,". That is shortage of Hardware and it is impossible for Halo 3 to sell more than 10 millions. But with a 500 millions user base doesn't means that the game will sell with the same proportion.

Halo 3 on a 10M userbase? Probably close to 10M. Halo 4 probably wouldn't be much affected by halfing the userbase, perhaps 8M instead of 10M, perhaps even 10M the same (most loses probably from less bundles sold). Would halo 3 sold 48M if launched on 85M userbase X360 got at end of its life? Would it have sold 120M if 200M consoles had been sold? UC4 would probably sell the same 8-10M with 23M consoles. UC1 to UC3 shows that even though the franchise got a lot better and the userbase escalated quite a bit the growth on SW sales weren't anywhere nea linear. Same with CoD, attach ratio for CoDs on the first 2 years of this gen were a lot higher than last gen, but then right now it isn't holding at the same standards. Know why? Because attach ratio decreases with more HW sales, because the lower the HW usually the more dedicated the fanbase.

We know Halo 5 sold 4m on instal base of 23m, how much will sale on same instal base like current PS4 of 45m!?

So you saying in that case Halo 3 would have around 100% attach rate!? :D

Of Course that isn't case, fact is higher instal base means higher posible buyers for evre game on that platform that basicle means higher sales for evre game on platfrom, lower instal base means lower sales for evre game on platform. Why do you think evre multiplatform game sold better on PS4 instead of XB1 and in most cases sales around double while sale of mulitiplaform games were identical on PS3/Xbox 360, because PS4 has double instal base and double potential buyers for every game on that platform, while PS3 and Xbox360 had identical instal base.

We know Halo 5 sold 4m on instal base of 23m, how much will sale on same instal base like current PS4 of 45m!?

So you saying in that case Halo 3 would have around 100% attach rate!? :D

Of Course that isn't case, fact is higher instal base means higher posible buyers for evre game on that platform that basicle means higher sales for evre game on platfrom, lower instal base means lower sales for evre game on platform. Why do you think evre multiplatform game sold better on PS4 instead of XB1 and in most cases sales around double while sale of mulitiplaform games were identical on PS3/Xbox 360, because PS4 has double instal base and double potential buyers for every game on that platform, while PS3 and Xbox360 had identical instal base.

It could be near 100%, why not? Do you have anything to disprove it? On less than 20M consoles it sold 12M SW, it's much more likely to have it selling 8M on 10M userbase (higher attach ratio) than 50M on 85M userbase (using your constant attach ratio). But you keep headed on the same illogical approach.

Because it's totally unreal to have near 100% attach rate, and you dont have any game that is even near of that attach expect even if include heavily bundled games (Wii Sports for instance have around 80% attach rate). Talking about illogical approach. :D