Of course Counter Strike and Dota 2 are not the only games i play actively. There are plenty.
Tony Hawk's Pro Skater: The games full of bugs and glitches that make it really fun and once you're used to smashing them buttons you can not get enough of it. Im actually running a mod called THUGPro that allows you to play any part of the whole series containing all THPS games ever created. These are Tony Hawk's Pro Skater 1 to 4, Tony Hawk's Underground 1 & 2 and Tony Hawk's American wasteland. I love listening to music while playing the game. It has a great and fun community, which has developed that mod.
Life is Strange is a cool singleplayer game that i have not finished it yet but the story is very thrilling so far. You are playing this girl called Max that attends this private school that has issues like any other school like bullying. Since it is a private school you have pupils with parents that have lots of influnce. Being able to rewind time you can always make up for mistakes.
Audiosurf is a cool arcade kind of game that let's you ride your own music. Based on the high and lows of the track that you are playing, the games' algorithm creates a track, that you are going to ride. Of course while doing so you're listening to the music that the game is based on.
Super Meat Boy is a jump'n'run game that is very hard in my opinion. You are this little meatball or whatever that has to come through a level. You can adjust how far and fast you are going to jump. The beginning seems simple but i could not get further than the second act of the whole game.