The extra Ammos, Knives, and Handguns are what I pulled out. The rest of the cards are all quite neccessary unless you straight up decide you dont want to use them. If you dont plan on playing partners mode, then cards like partners, star crossed duo, and archrival arent really neccessary (though thier bonuses still work). Same goes for infection cards if you dont plan on playing outbreak mode. But if you plan on at least trying all these modes then only the extra ammo, knives, and handguns are unneccessary.