University of Colorado students organizing another campus-wide game of Humans vs. Zombies in March are facing new restrictions from CU police: They can only play the game during daylight hours and they must do so only in pre-designated areas.

Those caveats come on top of CU police's much-publicized crackdown on Nerf guns -- the weapons of choice in the popular college variation on the game of "tag" -- prior to the launch of the game on the Boulder campus last December.

CU HvZ

For more information about the CU edition of Humans vs. Zombies, visit cuhvz.com.

Organizers still are discussing a spring edition of HvZ with university police, and so far have agreed that the game only will be played from 8 a.m. to 5 p.m. and that it will be done in a yet-to-be-determined area on campus in an effort to protect the safety of bystanders, CU police spokeswoman Molly Bosley said Wednesday.

"It might scare or cause concern for those not playing game or those unaware of it," Bosley said of CU's concerns about the game.

And like the December edition of Humans vs. Zombies, participants will throw balled-up socks at each other rather than fire foam projectiles, thanks to the university rule barring students from carrying simulated weapons on campus.

CU sophomore Scott Serafin and other student organizers have been working with CU police and administrators since December to get approval for the spring game, though they still are uncertain whether it happen. They're meeting with CU police again Friday.

"We have a long trail behind us, and still a long road in front of us, with getting Humans vs. Zombies approved for the spring semester," Serafin wrote in an e-mail.

Besides agreeing to the area and time constraints required by CU police, student organizers also offered to host two informational meetings to personally review and explain the new rules to players.

Created in 2005 in Maryland, Humans vs. Zombies is a week-long game of "tag" played on college campuses nationwide. During the game, a student moderator selects a head zombie, who is identified by a bandana worn on the head; that lead zombie then tags humans -- who wear bandanas on their arms -- and converts them to zombies.

CU police said there were no safety problems reported as a result of December's game and no students were accused of breaking the rules or using unauthorized weapons. The new restrictions are not due to any particular issue or complication, officials said, but, rather, a general concern for student safety.

"We are looking to improve safety throughout campus and this is part of it," CU police's Bosley said.

Serafin, the student organizer, said the game still will be worth playing despite the stricter regulations, although an off-campus variation also is in the works.

"We are considering off-campus missions using dart launchers, too," Serafin wrote in an e-mail.

An off-campus version of Humans vs. Zombies would be in addition to the CU game and would include side missions and a separate set of rules from the campus version.

"As far as I know, we would be the first school to take the game off campus and it would be to remedy the Nerf Blaster ban," Serafin wrote.