questions in Half-Life

I am new to Half-Life.

What the hell is this thing and how should I beat it?

Please tell me someone

Half Life o DOOM

Half Life or DOOM

A cake for @CaketasticCakes idea for half life cake

Have you guys realized that if the Black Mesa Incident was in 2003, then Half Life 2 would of took place now?????

Chickens of half life!!!

HEAD CRAB!!!!

Choose one my son

i need for GOD FOR SAKE mods of you for gmod anyways just give it pls cuss im thinking a collab or something idk but i need help if you would help giving me your mod

(Edit: on zip) i appreciation your help many thanks

(2 Edit: im on cracked gmod)