Update : i’ve been trying doom eternal with raytracing for quite some time now and the performance is excelent. It never drops below 144Hz with all settings maxed out at 1080p. I know that doom is really well optimised so don’t take this as a general review.
Epic does have its steamworks alternative called epic online services which provide more or less the same functionality (achievements, p2p networking, anti cheat…) but it’s also completely free, cross store, and cross engine
https://dev.epicgames.com/en-US/services-games