Use the '~' key during game-play to bring up the console to be able to enter the following


Weapons

Pistol:
Weapon_pistol

357 Magnum Revolver:
Weapon_357

Shotgun:
Weapon_shotgun

Overwatch Standard Issue Pusle-Rifle:
Weapon_ar2

MP7 with Grenade Launcher:
Weapon_smg1

Rocket Launcher:
Weapon_rpg

The Manipulator:
Weapon_physcannon

Gordon's classic:
Weapon_crowbar

Crossbow:
Weapon_crossbow

Bug Bait - from Antlion Guards:
Weapon_bugbait

Fragmentation Grenade:
Item_dynamic_resupply


Map codes

Spawns you in Lab:
D1_under_01

Spawns you in Train Station:
D1_trainstation_01

Spawns you in Ravenholm:
D1_town_01

Spawns you in the canals:
D1_canals_01

Spawns you in the city 17 rebellion:
D3_c17_01

Spawns you in Nova Prospekt:
D2_prison_01

Spawns you on the coast - Vehicle:
D2_coast_01

Dev Cheats
At the console enter 'sv_cheats 1'then enter the following codes

No damage:
'god'

Never Die:
'buddha'

Walk through walls:
'noclip'

Wire frame models:
'mat_wireframe1'

Only objects effected by physics are wireframe:
'vcollide_wireframe 1'

Infinite power for your suit:
'infinite_aux_power'

Kill all npc’s in the area:
'npc_kill'

Enemies don’t attack:
'notarget'

Spawn a scout car:
'ch_createjeep'

Spawn an airboat:
'ch_createairboat'

Spawn an airboat:
'impulse 83'

Spawn a Jeep
'Impulse 82'

All weapons and ammo:
'impulse 101'

skulls:
'impulse 102'

Removes weapon model from the screen:
'impulse 200'

Draw game triggers:
'showtriggers_toggle'

Draw normal maps:
'mat_normalmaps 1'

Draw surface materials:
'mat_normals 1'

Turn off bump mapping:
'mat_fastnobump 0'