http://www.guardian.co.uk/technology/gamesblog/2012/mar/12/top-20-video-games

Position	Game (age rating)	Platform (share%)		Weeks in chart
1 (–)	Mass Effect 3 (15+)	Xbox 360 (73) PS3 (14) PC (8)		1
2 (1)	SSX (3+)	Xbox 360 (54) PS3 (46)		2
3 (–)	Street Fighter X Tekken (12+)	PS3 (49) Xbox 360 (51)		1
4 (2)	Fifa 12 (3+)	Xbox 360 (47) PS3 (38) Wii (7) PSP (3)		24
5 (3)	Mario Party 9 (3+)	Wii (100)		2
6 (–)	The Sims 3: Showtime (12+)	PC (100)		1
7 (5)	Mario & Sonic London 2012 Olympic Games (3+)	Wii (58) 3DS (42)		15
8 (7)	Call Of Duty: Modern Warfare 3 (18+)	Xbox 360 (46) PS3 (45) PC (4) Wii (3)		18
9 (9)	Assassin's Creed: Revelations (15+)	Xbox 360 (49) PS3 (43) PC (7)		16
10 (14)	Zumba Fitness (3+)	Wii (82) Xbox 360 (12) PS3 (5)		50
11 (16)	Rayman Origins (7+)	VITA (37) Xbox 360 (28) PS3 (24) Wii (11)		10
12 (10)	Battlefield 3 (16+)	Xbox 360 (52) PS3 (34) PC (13)		20
13 (13)	The Elder Scrolls V: Skyrim (15+)	Xbox 360 (44) PS3 (41) PC (16)		18
14 (17)	Just Dance 3 (3+)	Wii (79) Xbox 360 (18) PS3 (2)		22
15 (–)	Unit 13 (16+)	PS Vita (100)		2
16 (4)	Uncharted: Golden Abyss (16+)	PS Vita (100)		3
17 (6)	UfFC Undisputed 3 (15+)	Xbox 360 (55) PS3 (45)		4
18 (12)	Batman: Arkham City (15+)	PS3 (62) Xbox 360 (35)		12
19 (18)	Saints Row: The Third (18+)	Xbox 360 (62) PS3 (37)		17
20 (20)	Rage (18+)	Xbox 360 (52) PS3 (37)		17

UKIE Games Charts© compiled by GfK Chart-Track

ah this will help a bit. thx.
Even though 360+PS3+PC is only 95%...


127k - ME3 - 192k

at least:
93k for 360 version
18k for PS3 version
10k for PC version

at most:
140k for 360 version
27k for PS3 version
15k for PC version


(127k consists of the previous 4 No. 1s, 192k of the previous 5 No. 1s)

Mass Effect 3 takes all of the top 3 slots with a split of 73% on Xbox, 14% with the PS3 and 8% on PC.

Sheeeeeesh

In Neogaf someone put the overall figure at 160k which is great, 160k is extrapolated 100%.

Italy:
1) COD: Modern Warfare 3 (PS3)
2) FIFA 12 (PS3)
3) Just Dance 3 (Wii)
4) Mario Party 9 (Wii)
5) Mario Kart 7 (3DS)
6) Uncharted 3: L'Inganno di Drake (PS3)
7) Uncharted: L'Abisso D'Oro (PSV)
8) GranTurismo 5 (PS3)
9) Mario & Sonic ai Giochi Olimpici di Londra 2012 (3DS)
10) Kirby's Adventure (Wii)


Italy February 2012:
1) Just Dance 3 (Wii)
2) COD: Modern Warfare 3 (PS3)
3) Uncharted 3: L'Inganno di Drake (PS3)
4) FIFA 12 (PS3)
5) Kirby's Adventure (Wii)
6) Mario Kart 7 (3DS)
7) Uncharted: L'Abisso D'Oro (PSV)
8) Wii Play Motion + Wii Remote Plus (Wii)
9) Uncharted 3: L'Inganno di Drake (PS3)
10) Super Mario 3D Land (3DS)

73 + 14 + 8 = 95%

 Is there another version of ME3 instead 360, PS3 and PC???

GT5 in top ten? Its because of XL release?

....I live in a country still with CD-roms.... -_-"

XL is just for US and Japan... Itally loves GT5.

Perhaps digital? I dunno, or 360 bundles.