If people use guns to kill themselves, will they stop killing themselves if we take the guns away? Maybe some will, if the alternatives take so much more time, but the impact won’t be massive.

Generally yes, Suicide tends to be a spur of the moment decision to go through with it and having immediate access to a very easy, very lethal method increases the rate significantly. There have been numerous studies that show that putting up barriers at bridges etc that are commonly jumped from dreastically reduces the suicide rate from them without raising it elsewhere e.g.

Presumably the devs have to agree to it. I dont think gog cn just decide “were going to give away this game we dont own for free”