The Coldest Game is purely fictional. It was crafted by the imagination of the writers and not inspired by actual happenings. The story and characters are invented for entertainment purposes.
Another could be 'The 33'. It is based on the true story of the 33 Chilean miners who were trapped underground in 2010. The miners had to endure cold, dark and difficult conditions. They fought for survival for 69 days. The movie shows their struggle against the elements and how they managed to stay alive in that cold and harsh underground environment.