@Matrix said in How to mod & play with friends safely?: Infinite ammo cannot be done client-side. Since my client hosts the game - let's say a custom zombie lobby - if I change the value of the amount of bullets, it will be the default in the game, since I am the server. I could do that, so it is possible, but only if I host the game. Of course on external server it won't work, which is perfectly fine, because it was for me and my friends. Maybe infinite ammo was a bad example, but changing values inside your client is possible, since it acts like a server when I do host the game. Hope it was understandable Thanks for the answer anyways!! I will check dedicated servers & mods, thanks!