A gun locker in the house was open when police arrived in the aftermath of the shootings, and there was no sign it had been broken into.
Investigators found a 7-foot pole with a blade on one side and a spear on another, a metal bayonet, three samurai swords, a .323-caliber bolt-action rifle, a .22-caliber Savage Mark II rifle and a .22-caliber Volcanic starter pistol. There was a military-style uniform in Lanza's bedroom; literature seized from the house included a news article on a 2008 shooting at Northern Illinois University and a National Rifle Association guide to pistol shooting.
News outlets including The Associated Press reported previously that Lanza showed interest in other mass killings. Some, including The Hartford Courant, reported that he had a particular interest in Norwegian mass murderer Anders Behring Breivik, who killed 77 people in twin attacks in 2011 in Norway's worst peacetime massacre.
In a duffel bag, investigators found ear and eye protection, binoculars, numerous paper targets and an NRA certificate that belonged to Adam Lanza. The NRA said Lanza was not a member.
An unnamed person told investigators that Lanza was an avid gamer who played "Call of Duty" and rarely left his home. The affidavit, which is partially blacked out, also has that person saying that Sandy Hook, the school Lanza attended as a child, was his "life."
On the day of the massacre, Lanza took two loaded handguns to the school along with the Bushmaster rifle. A fourth gun, a loaded 12-gauge Saiga shotgun, was found in the passenger compartment of his Honda Civic, along with 70 shotgun rounds.
Lanza went through six 30-round magazines for the Bushmaster, although half of them were not completely empty, and police said he had three other 30-round magazines in addition to one that was in the rifle.
A judge's order to seal the warrants expired on Wednesday, and a Danbury Superior Court judge granted a request by Sedensky to withhold some details. Sedensky asked to redact the name of a witness, saying the person's safety might be jeopardized if the name were disclosed. He also asked that the release not include other information such as telephone numbers, serial numbers on items found and a few paragraphs of an affidavit.
Malloy, a Democrat in his first term as governor, said the fact that Lanza left smaller magazines at the house should boost support for a state ban on high-capacity ammunition magazines.
"That somebody could get 154 shots off in less than five minutes, kill 20 children and six adults, is disturbing," Malloy said.
Connecticut House Minority Leader Lawrence Cafero Jr., a Republican, said he expects the General Assembly will be ready to vote next week, possibly Wednesday, on a package addressing gun control and other issues raised by the shooting.
Associated Press writers John Christoffersen, Dave Collins and Susan Haigh in Hartford and John Christoffersen in New Haven contributed to this report. Melia reported from Hartford.