Right is earned through investment.
A creator invests a substantial amount of time and effort into something.
A complainer can invest no time or effort into something.
And specific to the gaming community, there's a distinction between investing consumption time (e.g. playing) and creation time (e.g. modding or building).
I'd allow that playing confers substantial rights ("I've played this game over 1,000 hours and I think..."), but those rights should never be confused with creator rights.
Which is what makes amateur game criticism so toxic to me ("I can't do what you do, nor have any interest in investing the effort, but let me tell you how to spend your time to do what I want").
Especially in the performance-limited era of Half Life, most gamers didn't know a damn thing about the boundary of the possible.