Things You'll Need
Instructions
Select the "Cooperative" mode from the title screen.
Choose the "PlayStation Network" option to play online.
Make the match private with the "Private Match" option. Death cards are not available during public matches.
Select "Settings," then change the "Game Mode" to "Nazi Zombies" and enable death cards from the "Game Rules" sub-menu.
Scroll through the list of unlocked cards on the right side of the menu and click each one that you want to take effect to enable it.
Return to the main menu of the private match and pick the "Start Match" option. The enabled cards will take effect until the end of the match.