It's been a long time coming, 3:33:25 is no joke, so here are the timestamps:
Dead Rising All Achievements Timestamp Courtesy of RP:
Video Start - 0:00
Playthrough 1 (Frank The Pimp/Zombie Genocider) START - 0:34
Helicopter and Mall Intro Section - 2:55
Achievement 1: Group Photo - 4:00
Achievement 2: Portraiture - 4:55
Playthrough 1 True Game Start - 5:50
Achievements 3 and 4 (The Artiste/Photojournalist) - 6:30
This marks the majority of PP Stickers and Clothes Horse, focusing on every plaza until we're finished.
Paradise Plaza 1- 8:52
Colby's Movieland PP Stickers and Clothes Horse - 11:08
Paradise Plaza 2 - 12:30
Achievement 5: Freefall - 13:52
Leisure Park PP Stickers - 14:48
Food Court - 16:25
Al Fresca Plaza - 18:40
Achievement 6: Sharp Dresser - 20:38
Entrance Plaza - 21:43
Achievement 7: Raining Zombies - 26:49
Achievement 8: Carjacker (1st chance, get for sure in playthrough 2) - 27:22
Adam McIntyre Psychopath Battle Prep - 29:00
Wonderland Plaza - 29:39
Achievement 9: Clothes Horse - 32:06
Adam McIntyre Psychopath Battle - 32:50
Achievement 10: Self Defense - 37:31
Unlocking Wonderland-Paradise Plaza Shortcut CRITICAL - 37:38
North Plaza (including Seon's and Crislips) - 39:05
Maintenance Tunnels (Key and Zombie Genocider Start) - 43:32
Achievement 11: Stunt Driver - 44:22
Day 2 (Frank the Pimp starts here, follow instructions very closely) - 48:51
Achievement 12: Bullet Point - 49:48
Cliff Hudson Psychopath Battle - 51:30
Achievement 13: Costume Party - 56:03
Jo Slade Psychopath Battle - 57:52
Achievement 14 and 15 (Tour Guide/Frank The Pimp) - 1:00
Survivor Stuff over for this playthrough
Final PP Stickers in Cult Hideout - 1:00:33
Contingency if you missed a PP Sticker - 1:02:41
Achievement 16: PP Collector - 1:03:31
Zombie Genocider: Remaining 53594 Kills - 1:03:41
Achievements 17, 18 and 19: Zombie Hunter, Killer, Genocider - 1:05:07
Misc Achievement Wrap Up (Gourmet actually starts Here) - 1:05:48
Achievement 20: Strike! - 1:06:30
Gourmet - 1:07:25
Achievement 21 - Item Smasher 1:12:09
1000 Unarmed Zombie Kills for Karate Champ - 1:12:22
Achievement 22: Zombie Road - 1:13:47
Achievement 23: Gourmet - 1:14:40
Achievement 24: Karate Champ - 1:15:16
Achievement 25: Stunt Rider - 1:15:42
Final Playthrough Wrapup - 1:16:22
Playthrough - 1 END
Achievement 26: 3 Day Survivor
Playthrough 2 (Saint/Overtime): Start- 1:17:30
True Start of Saint/All Cases - 1:20:25
Day 1: Start
Transmissionary is very specific, listen closely to instructions involving all calls.
It starts at 1:21:50
Carjacker Alternate (if missed first playthrough) - 1:30:30
Psychopath Battle: Cletus Samson (Unlisted) - 1:35:40
Psychopath Battle: Adam McIntyre (Out of Control) - 1:37:50
Day 1: End
Day 2: Start - 1:42:30
Psychopath Battle: Sniper Carlito - 1:43:50
Psychopath Battle: Steven Chapman (Medicine Run Case) - 1:45:00
Achievement 27: Psycho Photo
Psychopath Battle: Cliff Hudson (Hatchet Man) - 1:52:40
Psychopath Battle: Jo Slade (Above the Law) - 1:56:30
Achievement 28: Peacekeeper - 1:58:00
Psychopath Battle: The Hall Family Snipers - 2:00:00
Achievement 29: Marathon Runner - 2:00:50
Maintenance Tunnel Key (Important) - 2:03:27
Psychopath Battle: Motorcycle Isabella - 2:04:35
Day 2: End
Day 3: Start - 2:05:30
Achievement 30: Census Taker (earliest possible) - 2:06:00
Achievement 31: Level Max (plenty of time to level) - 2:07:45
Psychopath Battle: Sean Keanan - 2:08:45
Achievement 32: Psycho Collector (earliest possible) - 2:09:10
Psychopath Battle: Paul Carson - 2:15:20
Achievement 33: Punisher - 2:15:40
Psychopath Battle: Kent Swanson - 2:18:00
Final Survivor (Saint locked in) - 2:20:00
Achievement 34: Snuff Shot-B - 2:23:30
Psychopath Battle: Larry Chiang - 2:27:00
Achievement 35: Full Set - 2:2 7:30
Achievement 36: Transmissionary (thank god) - 2:28:00
Achievement 37: Snuff Shot-J - 2:29:45
Achievement 38: Hella Copter - 2:31:10
Achievement 39: Legendary Soldier - 2:32:40
Achievement 40: Perfect Gunner - 2:33:00
Day 3: End - 2:36:00
Achievement 41: Overtime Mode
Achievement 42: Life Saver
Achievement 43: Humanist
Overtime Mode: Start - 2:37:00
Cheese Strategy Prep for Brock - 2:42:30
Final Battle 1: Prototype Tank - 2:45:15
Final Battle 2: Brock Mason - 2:46:20
Overtime Mode: End - 2:48:00
Achievement 44: Infinity Mode
Achievement 45: Unbreakable
Achievement 46: Saint
Playthrough 3 - Infinity Mode - 2:48:45
IRL Preparations and Infinity Mode Background (sounds dumb, but important) - 2:49:40
Infinity Mode Walkthrough Start - 2:58:00
Achievement 47: Outdoorsman - 3:08:00
Achievement 48: 5 Day Survivor - 3:25:00
Achievement 49: Indoorsman - 3:27:30
Achievement 50: 7 Day Survivor - 3:31:00
(If you're on PS4, you'll get the Platinum Trophy here as well)