半条命2还没有正式发布，作弊码已经先行从互联网上流出，半条命2作弊首先要在桌面半条命2的快捷方式上添加"-console"这个命令行参数，"C:Program FilesHalf-Life 2hl2.exe" -console。然后进入游戏，按“～”呼出控制台，就可以输入以下作弊代码：

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

cl_showfps 1 - Shows frames per second in game

npc_create - Creates an NPC (works in worlds that have an NPC entity)

npc_create_aimed - Creates an NPC aiming away from the player.

picker - Toggles 'picker' mode.

setpos - Move player to specified origin (must have sv_cheats 1 enabled).

setang - Snap player eyes to specified pitch yaw (musthave sv_cheats).

sv_gravity # - Set gravity to #

sv_stopspeed # - Set minimum stopping speed when on ground to #

sv_friction # - Sets world friction to #

sv_bounce # - Sets bounce multiplier for physically simulated objects collision

sv_maxvelocity # - Sets the maximum velocity of any moving object to #

sv_waterdist # - Sets vertical view fixup when eyes are near water plane to #

air_density # - Changes the density of air to #

dsp_explosion_effect_duration # - Sets length of confusion/ear-ringing effect to #

prop_debug - Toggle bounding-boxes debug mode on/off (red - ignore damage, white - respond to damage, green - health)

sv_soundemitter_filecheck - Toggle reporting missing .wav files for sounds

mat_numtextureunits # - Limits the number of texture units to # (0 - let the game decide how many texture units to use)

mat_yuv 0 - ?

另外，今天网上也泄漏出半条命2常用的一些命令行参数：

-r_anamorphic 0

-netgraph 3

-mat_preloadshaders

-preload

-console

-dx9

-fullscreen

-width 1024 -height 768

-heapsize 80000

-dxlevel 90

-shaderdll shader_nvfx_ps20.dll

-mouselook

-dx8

-condebug

-sw

-startwindowed

-window

-windowed