The ESRB (Entertainment Software Rating Board) gives the Halo games their ratings.
http://www.esrb.org/
Halo halo - 2008 is rated/received certificates of: USA:PG
Halo - 1996 is rated/received certificates of: India:U
Yes and no. Megablocks makes Halo Universe sets.
MegaBlox makes Halo sets. LEGO does not.
No. Bungie (the company that makes halo) is partnered with Microsoft and therefore only makes games for that platform. If you want to play Halo, you'll have to get a 360.
Yes, they are kind of. There is a person out there who makes custom halo Lego and ships them in boxes. He makes them with his own instructions.
Halo 4 - 2012 VG is rated/received certificates of: Singapore:ADV
Halo Wars - 2009 VG is rated/received certificates of: Australia:PG
bungie
Halo Reach - 2010 VG is rated/received certificates of: Australia:MA USA:M
The Halo Effect - 2004 is rated/received certificates of: Australia:MA Ireland:15 Singapore:NC-16
its war in the future.