[atoav]

Easy, just explain exactly what you collect, what not, for which exact purposes you will use that data and why — and exclude purposes you will definitly not use it (e.g. send it to third parties, sell it to the highest bidder). Additionally say what is anonymized, aggregated etc, if that applies.

Then add a: "If anything about that should ever change, you you will be notified and asked again within this game".

Then consider addin an option where technically interested users can actually see that data in full.

If you collect reasonable data and explain clearly why people help you the dev when they share it with you, more people might be inclined to do so.

If you make a wishy washy marketing speech that says nothing will just click no.

TL;DR: Be honest, precise and make a promise that people can check you on and explain why they help you with this.