Hello!
The following are free to own forever, as long as you claim your copies before 16:00 UTC on the 16th December.
Wildcat Gun Machine
https://store.epicgames.com/en-US/p/wildcat-gun-machine-c66c4e
Saints Row IV: Re-Elected
https://store.epicgames.com/en-US/p/saints-row-iv-re-elected
Have fun!