Well 2010 is going out with a bang!  With the release of Halo Reach and GT5 in the same year and similar install bases, we can finally get a fair comparisson of sales.  The analysis below pretty much tells the story.  Halo seems to edge out GT5 as the more popular series.  Both games are great, but pretty much any way you twist the data HALO comes out on top.  Let's examine the facts.

Battle #1

• Halo ODST, a full priced $60 expansion easily outsold a cheaper GT5P
• GT5P only cost $40 versus $60 for Halo: ODST
• ODST outsold GT5P's limetime easily in less than 1 year
• Verdict:  Halo wins Battle #1

Battle #2

• Halo Reach 3.3 million 1 month in strongest region (America)
• GT5 3 million DURING CHRISTMAS (#1 shopping time of year) in strongest region (Europe)
• Veridict:  Halo wins Battle #2

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Other interesting information, predictions and trends:

• GT5 will never outsell Halo Reach or  Halo 3 unless heavily bundled  (Extrapolating current sales trends)
• GT5 has a lower Metacritic score than Halo 3 and Halo Reach which is probably one reason why GT5 is lagging behind Halo in sales
• XBOX 360 is pirated, therefore it is logical to assume MILLIONS of Halo game sales have been lost due to piracy.
• PS3 is NOT pirated, therefore it is logical to assume zero games sales have been lost due to piracy.
• It seems that the HUGE ps2 install base greatly benefitted GT3 and GT4
  

really? OMG... What the hell is happening to these forums!? this is not the VGC i loved once...

where have you been in the past 5 months? ps3 i hacked. also considering the top pirated pc game of the year got pirated 4 millions times and the top pirated wii game got pirated 1.2 million times i doubt halo is loosing millions due to piracy. its loosing them due to call of duty.

Not sure what you mean.  Before Halo Reach and GT5 launched there was a great amount of discussion on this website and others as to which was the bigger/ more popular franchise.  Please have a discussion instead of just throwing out baseless sarcasm

PS3 games CAN be pirated now...and GT5 is doing on par with GT4(almost),and Halo being pirated more doesn't mean it's bigger...pirates download like anything that can be downloaded...So...your last 4 points are pretty much invalid.

Halo Reach 1 month of sales > GT5 1 month of sales means Halo Reach has won the battle?Not really,since GT games have monstrous legs.

GT5P was a demo,Halo ODST was an expansion,so your comparison is...INVALID..

This thread...INVALID!!!

Sorry I'm a bit drunk o_O

The PSJailbreak hack doesn't work with GT5.  This has been proven which is exactly why GT5 was delayed.

GT5 cannot be pirated in its current state

Yes Halo is bigger than GT5, we all know this.

GT5 has the b enefit of releasing during Christmas.  It has been estimated that launching during this window gives at least a 15-20% bump in sales.  Therefore, when we align launches and see GT5 was released a month before Christmas and Halo Reach was released in September, the advantages tilts towards GT5

You did say in the OP that PS3 is NOT pirated...

Dude... really? It's a new year..