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