1: 5G tower, complete the first boss fight and you can find it in the press box via a red orb. Unsure if you need to do the hard mode boss as well.

2: Gunney Hartman, complete all JROTC challenges and find radios starting from the North entrance to the left of the teleporter going to the north gym. Unsure where to find others as I haven't played in a while so uhh sorry about that.

3: "SAM" enabled by default, but you can find the green orb in the North Cafeteria to the left of speed cola if you have one of the others enabled already.

I'll take a look around, I'm fine with replaying the map again cause It's a fun experience

I activated the 5G tower and Gunney Hartmann announcers on my last match and i didn't receive the modifier. Im wondering if there is a rare voice quote or annother announcer. But i have a doubt ¿do you know if i can unlock modifiers on an offline match?

The voice quotes you need for the announcers are all of the following:
3 Announcers, Sam, Gunney, 5G Tower
ALL Powerup lines:
Max Ammo, Insta Kill, Nuke, Carpenter, Fire Sale, Double Points, Death Machine
(Note if you're playing with multiple people, each player individually needs to hear the DM Line, one player hearing it doesn't 'tick them off' for everyone in the lobby
Dog round lines
Box moving lines

I don't THINK being offline would be an issue, cause I'm Pretty sure the save data file is saved locally on your PC, but will be uploaded to the Steam cloud when you reconnect, if you've opted in and allat

Originally posted by Trollofduty007:

The voice quotes you need for the announcers are all of the following:
3 Announcers, Sam, Gunney, 5G Tower
ALL Powerup lines:
Max Ammo, Insta Kill, Nuke, Carpenter, Fire Sale, Double Points, Death Machine
(Note if you're playing with multiple people, each player individually needs to hear the DM Line, one player hearing it doesn't 'tick them off' for everyone in the lobby
Dog round lines
Box moving lines

Thanks I forgot to mention listening to all voice lines for everything.