Every game is a free-to-play game where I come from ? Joking aside, my personal best, the one I am still playing, is League of Legends. I don't have much time to spend on games nowadays, so it is perfect for me, the game is from 20 to 40 minutes long, there is no preparation for it, and you don't have to think about it afterward. Graphics and mechanics are great. All my buddies are also playing, so we make our own team of 5 and play together from time to time.