进入游戏——“设置”——“游戏设置”——“游戏”——“启用开发者控制台（~）”，选择“是”，之后按“~”键（ESC下面）即可打开控制台功能。然后，选择单机模式（游戏模式和地图随意）。进入地图后，打开控制台，输入下方控制台命令打开Cheat模式和近战武器掉落：然后你就会发现按“G”键可以扔掉手中的默认匕首，然后继续在控制台分别输入以下指令，就可以获得对应的刀子。
详细答案：
流浪者匕首
give weapon_knife_outdoor;ent_fire weapon_knife addoutput "classname weapon_knifegg"
骷髅匕首
give weapon_knife_skeleton;ent_fire weapon_knife addoutput "classname weapon_knifegg"
求生匕首
give weapon_knife_canis;ent_fire weapon_knife addoutput "classname weapon_knifegg"
系绳匕首
give weapon_knife_cord;ent_fire weapon_knife addoutput "classname weapon_knifegg"
海豹短刀/经典匕首
give weapon_knife_css;ent_fire weapon_knife addoutput "classname weapon_knifegg"
刺刀
give weapon_bayonet;ent_fire weapon_knife addoutput "classname weapon_knifegg"
折叠刀
give weapon_knife_flip;ent_fire weapon_knife addoutput "classname weapon_knifegg"
穿肠刀
give weapon_knife_gut;ent_fire weapon_knife addoutput "classname weapon_knifegg"
爪子刀
give weapon_knife_karambit;ent_fire weapon_knife addoutput "classname weapon_knifegg"
M9 刺刀
give weapon_knife_m9_bayonet;ent_fire weapon_knife addoutput "classname weapon_knifegg"
猎杀者匕首
give weapon_knife_tactical;ent_fire weapon_knife addoutput "classname weapon_knifegg"
蝴蝶刀
give weapon_knife_butterfly;ent_fire weapon_knife addoutput "classname weapon_knifegg"
弯刀
give weapon_knife_falchion;ent_fire weapon_knife addoutput "classname weapon_knifegg"
暗影双匕
give weapon_knife_push;ent_fire weapon_knife addoutput "classname weapon_knifegg"
鲍伊猎刀
give weapon_knife_survival_bowie;ent_fire weapon_knife addoutput "classname weapon_knifegg"
熊刀
give weapon_knife_ursus;ent_fire weapon_knife addoutput "classname weapon_knifegg"
折刀
give weapon_knife_gypsy_jackknife;ent_fire weapon_knife addoutput "classname weapon_knifegg"
短剑
give weapon_knife_stiletto;ent_fire weapon_knife addoutput "classname weapon_knifegg"
锯齿爪刀
give weapon_knife_widowmaker;ent_fire weapon_knife addoutput "classname weapon_knifegg"
金刀
give weapon_knifegg;ent_fire weapon_knife addoutput "classname weapon_knifegg"
幽灵之刃
give weapon_knife_ghost;ent_fire weapon_knife addoutput "classname weapon_knifegg"
CT默认匕首
give weapon_knife
T默认匕首
give weapon_knife_t
