I'm not into video games (except for a brief stint with Tetris when I was in college), however these "games" are designed to improve memory, peripheral vision and other good stuff. And it doesn't cost anything to sign up. The brain games are really nicely designed and don't flash like crazy or cause over stimulation. In face the bird watching game (the first one you will be introduced to) is actually quite calming.
Reclaim Your Brain: Improve Memory with Lumosity Games.
Give it a try and let me know what you think.