我想知道这些密码的意思！

这是些《半条命2》的作弊码，我想知道都是什么意思？还有我的HL2中NPC都像死了一样，敌人也不攻击我，我的剧情也无法继续进行，请问该怎么办？谢谢！god - God mode (server side only)

give - Gives a weapon or an item (see the list below)

buddha - Reduces your health

hurtme # - Hurts the player (# is damage amount)

impulse 101- All weapons

impulse 82 - Spawns a jeep

notarget - Player becomes hidden to NPCs

noclip - Walk through walls (server side only)

maps - Displays map list

map - Load a specified map (see the list below)

developer # - Sets developer mode to on/off/verbose (0-off, 1-on, 2-verbose)

+mlook - Enables mouse look

hud_quickhelp/text? 1 - Shows crosshair

viewmodel_fov # - Sets the size of the weapon you're carrying (54 is default)

exec - Execute a script file

cl_drawhud 1 - Turns hud display on

cl_enablehud 1 - Turns hud display on