If Gujian3(古剑奇谭三) generated the same gross revenue on the Epic Games Store, 上海烛龙信息科技有限公司, Aurogon Shanghai would keep approximately $30,651,005 - that's $5,130,262 more than on Steam.
At this revenue level, Epic's concrete platform fee would be $4,043,319. Epic charges 0% on the first $1 million in annual per-app revenue and then 12% on the remaining amount. On GOG (30% cut), the developer would earn approximately $24,286,026.
Note: This is a hypothetical comparison. Actual sales volumes differ significantly between platforms, and Steam's larger user base typically drives substantially higher sales.