My family has a film example - not gaming - but it is entertainment.
I haven't done one. My brother did two flexible spending GoFundMe campaigns to earn a little money for two of his low budget horror films.
He raised $2, 310 ($1000 came directly from one person rather via GFM) for the first
He raised $2, 750 for the second ($1500 from one person)
Stash https://www.indiegogo.com/projects/stash#/
Devil's Five https://www.indiegogo.com/projects/devil-s-five#/
He did lesser rewards that didn't include the product at the lower end such as such as thanks and credit. In the mid range he did easy things such as the product and a signed poster. Upper rewards included a skype interview and a digital script. One person in each short film even claimed the highest donation perk - which if I recall they was there for the entire shoots, in the movies, and credited as producers.
What is important is to do things somewhat easy, possible, and not beyond your ability or means. And to not forget about shipping costs - which can be horrendous internationally - if it's a physcial product.
I'm sure gaming has similar rewards.
He chose GoFundMe, since he could take whatever money that he raised. I know Kickstarter is all or nothing. I think Kickstarter and Patreon are for gaming however. Unless your name is established, don't expect a lot. But at least it help get his movie out there for publicity, raised a little capital, and some pre-purchases.