Step 1. Open console (` or ~ key)

Step 2. Paste the following:
alias impulse_101 "give item_suit; give item_longjump; give weapon_crowbar; give weapon_glock; give weapon_357; give weapon_mp5; give weapon_shotgun; give weapon_crossbow; give weapon_rpg; give weapon_gluon; give weapon_tau; give weapon_hivehand; give weapon_frag; give weapon_satchel; give weapon_tripmine; give weapon_snark; give item_healthkit; give item_battery"

Step 3. Now, type impulse_101.

Done! Please leave an award if you appreciate this. I am but a humble steam award farmer.

EDIT JULY 2023: if using the alias "impulse_101" is giving errors as of the latest version of the game (due to impulse_101 already existing in Black Mesa, unbeknownst to my former self), change it to something that doesnt already exist like "freeman"

EXTRA!
Paste the following:
alias refill "impulse_101; impulse_101; impulse_101; impulse_101; impulse_101; impulse_101; impulse_101; impulse_101; givecurrentammo 200;"

You could take this a step further, by binding the command to a key. For example, bind x "refill".

Type refill in console to fill up your health, suit and currently equipped weapon. Unfortunately, there is no command I am aware of that refills all ammo reserves, so you will have to use this before running out of ammo on your given weapon. Leave a comment if you find a better solution!


Again, like and award if this helps :)

sv_infinite_ammo 1 (self explanatory, infinite ammo)
ent_remove_all trigger_hurt (use on Interloper chapter for Laser Immunization achievement)

sv_long_jump_manacost 0 (Infinite longjump)
sv_long_jump_height 100 (Default value is 10, increases longjump power)

Thanks to mailman and Rushin' Russian for sharing this info in the first place, and Mengle for the original console command guide.



Thanks for reading, hope this helps. AWARD IF A COOL HALF LIFE GAMER ;D