“Tremors” is a cult horror about subterranean monsters that devour different animals and people. The franchise has long since slipped into very low-level films, but it still has fans. A free third-person shooter is currently being developed by one of the series fans and it will be developed on Unreal Engine 4.
Judging by the above cutscene. Players will be required to hide on rocks or buildings and shoot monsters underground and stuff like that.
The first edition of the game can be downloaded from the link provided by the developer in the description of the Youtube Video or directly from this page.
This is merely a fan project so don’t get your hopes up the roof.