Tell him that the mod/game belongs to Garry, and you cannot simply give it to him.

Give him a key for Garry's incident :D

Offer to give it to him but tell him you want the CV for it so you're putting a private giveaway link in an ITH puzzle that you'll only share with him. Make a puzzle that looks super easy but in reality can't be solved. Fifteen or so questions so every time he begs for a hint, you can reveal one answer but still not solve it for him.

give him bad rats

destroy them with lasers!

Best idea ever:

Grow up.

Dont buy any of his begs!

Translation:
"Not only do i have no life, but i can't think for myself either"

Give him Garry's Incident

i u have extra keys, u could give him, u will not go poor because of charity

Give him a link to Garry's Mod 9.

Accept to do it once he has spent a month living on the streets in the cold with no money, so that he learns the importance of food and shelter and the shame of having to beg to survive. Documented or it didn't happen.

k

The best idea you could have would be to find a hobby rather than doing this.

Feed him / her cakes !

Maybe just give him a Garry's mod? It's not that expensive, and you'd be doing the poor guy a favour.

Best thing: Start a trade, put the game in, wait for his light to turn green... then close the trade and tell him something is wrong. Do this over and over again...

Send him a used key of Garry's Mod and just watch him burst into flames.
Or you can invite him to trade and just show it to him and cancel the trade.
If he becomes too much of a bother then send him a chat msg and laugh
in his face for a while after telling him NO! Then proceed to unfriend and block him.
Problem solved :D

Send him this.

Send him TF2 crates

Send him Day One : Garry's Incident

Whats so bad with Day One: Garry's Incident? I want the game in my library. Is it that shithouse.

maybe you should tell him that if he wants it so bad he should buy it for himself. tell him to wait for a sale of like 75% or more off.