Looking at the Epic Games store website (link), the free game they are currently offering for everyone is listed below, along with the next free upcoming game.
- Lawn Mowing Simulator, free now until August 4th at 11am
- Unrailed!, a co-op multiplayer game where you build a train track across a procedurally generated world; it will be free from August 4th to 11th
Screenshot of the current and near future free game on Epic Games store
