User blog comment:Lunagia/I Want Tactical Knife!!!/@comment-3182180-20140430120018/@comment-24249644-20140505152251

Single Tactical Knife : Play on Dead End, because there is so many zombies spawning, just upgrade Health & Attack Power to level 15, however, if you didn't have/don't want to use any emergency medicine, you can upgrade Health to max level.

Double Tactical Knife : Play on Deathmatch, because it's easy to kill enemies with Double Tactical Knife, 1 hit on leg = instant kill if all the two knife hit.