If you walk east-west from the heli assault activity of henry steel mills, you will come up to a fenced up shack. It has a sign indicating 'Payne's Place - Keep out of the Mud'. As you get near the shack, you will hear constant dog barking and a laughing man. You will also find one or two toads parked.
Once Kenzies hideout is unlocked, go up stairs and find the room with all the computers in it. Once inside, pull out a sniper and zoom in on the ceiling, there will be a cluster of newspapers. If you read them they're all newspaper clippings from Volition's The Punisher game.
Listen to the following songs by tuning into the corresponding stations:
"Stand and Deliver" by Adam Ant "Fantasy" by Aldo Nova "Holding out For A Hero" by Bonnie Tyler "Machinehead" by Bush "Pepper" by Butthole Surfers "Epic" by Faith No More "Relax" by Frankie Goes To Hollywood "You're The Best Around" by Joe Esposito "Return Of The Mack" by Mark Morrison "Live Wire" by Mötley Crüe "Shout At The Devil" by Mötley Crüe "No Easy Way Out" by Robert Tepper "My Adidas" by Run DMC "Ball and Chain" by Social Distortion "What I Got" by Sublime "It's My Life" by Talk Talk "Birds Fly (Whisper To A Scream)" by The Icicle Works "Funky Cold Medina" by Tone-Loc
"Gimme What You Got" by Amanda Blank "Done Did It (feat. Nicole Wray & NOE)" by Blakroc "Throw Your Hands Up" by Freeway "My Life Is A Party" by G-Eazy "Power" by Kanye West "Get It In feat. Ammo & K. Madison" by K:B "I'm Burnt " by Kurupt "Don't Panik" by Medine "Paradise" by Mickey Factz "Quiet Dog" by Mos Def "In The Zone" by Pharoahe Monch "Fur In My Cap" by Rob Roy "Boom Bye Yeah" by Sean Price "Push Play" by Sixx John "Can't Stop Now" by Southpaw Swagger "The Countdown" by Sum Kid "93 hardcore" by Tandem "Yonkers" by Tyler, The Creator "Mirrors feat. Bun B" by Wale "Good to Go Feat Bun B" by Yelawolf
"Volcanology" by Brooklyn "Diamond Eyes" by Deftones "Clarion Call" by Delphic "Stupid Grin" by Dragonette "Renegades" by Feeder "Sha La La La La" by Heavy Young Heathens "Too Fake" by Hockey "Torture" by King Khan and The Shrines "Lost Desire" by JR "Animal" by Miike Snow "Riot Rhythm" by Sleigh Bells "Next Girl" by The Black Keys "In Cauda Venemum" by The Dear Hunter "Queen Dot Kong" by The Do "El Matador" by The Lines "Born Free" by The Rassle "Stop Searching aka Sweatpants" by Valencia "Paint Yourself" by White Denim
"Baggy Bottom Boys" by Jokers of The Scene "State of Ghetto Jackin feat. DJ Nasty" by Baobinga "Satisfaction" by Benny Benassi "A City in Florida" by deadmau5 "Idealistic" by Digitalism "Pitiless" by Dilemn "Heartbeats" by Grum "Double Bubble" by Jesse No "OH NO U DON'T" by Jesse No "Angry Elephants" by Junkie XL "Wallflower" by Kevin & Carrick "Scrub Down" by Kevin Seaton "C.L.U.B." by MNDR "Neckbrace" by Ratatat "Woo Boost" by Rusko "31 Seconds To Die" by The Bloody Beetroots "Don't Break It" by Tugboat
"Berzerker" by After The Burial "Runes To My Memory" by Amon Amarth "Obfuscation" by Between the Buried and Me "Perfect Weapon" by Black Veil Brides "Suicide Jag" by Chemlab "Feel Like I Do" by Drowning Pool "Apocalyptic Havoc" by Goatwhore "Regurgitated Disinformation" by Job for a Cowboy "WW III" by KMFDM "arma goddamn motherfuckin geddon" by Marylin Manson "Divinations" by Mastodon "Apologies Are For The Weak" by Miss May I "The Lotus Eater" by Opeth "Rise, Rebel, Resist" by Otep "Misanthropy Pure" by Shai Hulud "Love?" by Strapping Young Lad "Necropolis" by The Black Dahlia Murder "Farewell, Mona Lisa" by The Dillinger Escape Plan "Slow Revolution" by Tugboat "Engine Wrecker" by You Love Her Coz She's Dead
This is very rare! Whenever you find an NPC with a Prof. Genki outfit, attack him immediately as Prof. Genki drops $300 000 once he is killed! He appears as an enemy on your radar. Note that he has more health than a brute and will run once he sees you. If you attack him, he will fight back and may or may not pull out his stun gun. Bring in at least 1 homie with you when confronting him to make the job easier.
At the very bottom of Morning Star Camano Place there is a ship. Head to the south part of the ship, going up the two flight of stairs, to find a small dead penguin nailed to the wall. Shooting at it will make it bleed.
Head to your crib in the Downtown district and when you go up the elevator go to the far left and find a office with a computer. On the computer it says Johnny Cat and has a Keyboard cat with Johnny's head.
Go to Kinzie Kensington's crib and head upstairs, then go to the very back. You will find a Room with newspaper clippings taped all over the wall. Look at the headlines to see a few Easter eggs both new and from past games. You will find one with a headline about a zombie attack with the map of Still Water filled with red dots marking the spread of the outbreak.