Easy Money Grinding
At any time in the game after you first make it to the safe house and save your game, go to "quit game" and restart the story. After this DO NOT PRESS START TO SKIP THE CUT-SCENE. This will allow you do do the opening "Slicecycles" sequence again and gain $10,000 for coming in 1st place. This process can be done as many times as you'd like
Easy Leveling
To make your level skyrocket to level 50 go out to Fortune Park and head towards the Atlantica Casino. Don't go in. Follow the wall right until you see a maintenance door. There should be a stick of dynamite and a hunk of meat right outside the door. You want to pick both of these up and head inside. Combine them, to get the dynameat. Leave and head to the fireworks stand and grab some firecrackers. Then jump up on top of the stand and lure a large amount of zombies near you using the firecrackers. When you feel your group is large enough, jump into the middle of the crowd and use the dynameat, and get out quickly. The resulting explosion will cause your PP bar to go through the roof with points. All of the items respawn when you leave Fortune Park and come back so you can do this as many times as you like. This trick is still very effective at levels 45+.
Skip the entire opening sequence of gameplay on a NG+
If you skip the opening cinematic, you will also skip the Terror Is Reality section and the subsequent gameplay section all the way up to arriving at the emergency bunker.
Slot Machine Secret
When you see a pile of money (100$) in front of a slot machine, you are able to win the slot machine up to five times, then the machine you used will not be won again, until you go into the map again.
Ending requirements
Unlockable How to Unlock Ending A Do all cases and give Katey Zombrex every time but do not give TK Zombrex before completing The Facts. Ending B Give Katey Zombrex every time, starting from case 6-2, let the time pass by until it is 7AM on September 29; do not complete The Facts. Ending C Do not do the cases while Giving Katey Zombrex every time. Be in the safehouse before the military arrives. Ending D Be outside the safehouse by the time the military arrives. Ending F Do not give Katey Zombrex and be in the safehouse by the time the military arrives. Ending S (True ending) Do all cases and give Katey Zombrex every time, give TK Zombrex before completing The Facts.
Unlockables
| Unlockable | How to Unlock |
|---|---|
| Dealer Uniform | Try on every outfit in the game |
| Champion's Jacket | Win a TIR episode (be the overall top player by the end) |
| Convicts | Kill 10 psychopaths |
| Hockey Mask | Use every melee weapon on zombies |
| Tattered Clothes | Kill 1,000 zombies using hand to hand |
| TIR Helmet | Earn $1,000,000 in TIR Online |
| TIR Outfit | Earn $5,000,000 in TIR Online |
| Waitress Oufit, Bowling Shirt, Hunting Jacket, and Overalls | Start a game by importing a Case Zero file |
| Willemette Mall Costume | Rescue 50 survivors |
| Full Beard Moustache | Back of "Waves of Style" store in the Royal Flush Plaza |
| Knight Armor | Complete the game with the "S" ending |
| Knight Boots | Purchase at the Platinum Strip Pawnshop |
| Knight Helmet | Defeat Jack in a game of strip poker during the "Ante Up" side mission. |
Achievements
| Achievement | Description |
|---|---|
| Apprentice Rising (20) | Reach level 25. |
| Bartender (20) | Mix a drink. |
| Better With a Friend (20) | Solve all case files in Co-op. |
| Big Spender (20) | Spend $6,000,000 in Fortune City. |
| Chuck Greene: Cross Dresser? (20) | Change into all the clothes in the game. |
| Clean Record (20) | Complete The Facts. |
| Come on! Follow me! (20) | Escort 8 survivors at once. |
| Curiously Inventive (20) | Collect all combo cards hidden in Fortune City. |
| Custom Finish (20) | Give your bike a custom paint job. |
| Data Miner (20) | Fill all entries in the notebook. |
| Death From Afar (20) | Use every type of ranged weapon on a zombie. |
| Don't you die on me! (20) | Revive another player in Co-op. |
| Duct Tape FTW (20) | Create all combo weapons. |
| Explosive Temper (20) | Use every type of explosive on a zombie. |
| Fashion Aficionado (20) | Change into 10 different pieces of clothing. |
| Father of the Month (20) | Give Katey a gift. |
| Father of the Year (20) | Give Katey every possible gift. |
| Finally Full (20) | Eat all types of food in the game. |
| Full Deck (20) | Collect all combo cards. |
| Half Deck (20) | Collect 25 combo cards. |
| Having A Gas (20) | Kill 1,000 "special" zombies. |
| He hasn't covered wars... (20) | Use every type of firearm on a zombie. |
| Head Trauma (20) | Use every type of melee weapon on a zombie. |
| Hero of Fortune City (20) | Save 50 survivors. |
| Improper Behavior (20) | Spraypaint all Zombrex posters. |
| Judge, Jury and Executioner (20) | Defeat 10 psychopaths. |
| Justice Served (20) | Complete Overtime Mode. |
| Life Saver (20) | Collect all survivor combo cards. |
| Look at all that juice! (20) | Create and consume all mixed drinks in the game. |
| Masquerade (20) | Have 10 zombies with masks on at once. |
| Needs more chainsaw (20) | Create a combo weapon. |
| Professional Rising (20) | Reach level 50. |
| Rising Star (20) | Come in first place in a single TIR event. |
| Saving the Day (20) | Save 10 survivors. |
| Slaughter - S = Laughter! (20) | Use every type of novelty weapon on a zombie. |
| Smashy (20) | Smash 100 zombies using the Smash skill move. |
| Stick 'em up (20) | Stick it to a zombie by covering him in weapons and objects! |
| Tape it Or DIE! (20) | Discovered The Secret Combo Card. Did You Cheat By Checking Online? |
| The Skill To Survive (20) | Tame Snowflake. |
| TK's Favorite (20) | Play and win in all 9 TIR events. |
| Tough Guy (20) | Collect all combo cards from psychopaths. |
| Vigilante Justice (20) | Defeat 5 psychopaths. |
| Win Big! (20) | Finish in first place in a TIR episode. |
| Window Shopper (20) | Enter all the stores in the game. |
| Wrong kind of "Chopper" (20) | Kill 1,000 zombies while riding a motorcycle. |
| Z-Genocider 2: Genocide Harder (20) | Kill 53,596 zombies. |
| Zombie Destruction (20) | Kill 5,000 zombies. |
| Zombie Fu (20) | Kill 1,000 zombies barehanded. |
| Zombie Genocide Master (20) | Kill 72,000 zombies. |
| Zombie Slaughter (20) | Kill 500 zombies. |
