Yesterday's game? Jagged Alliance, specifically the portrait icons of all the mercenaries you hire (showing their health, remaining action points, stamina and so on). Great, great game that I'd love to see get properly remastered one day.
I don't have the iPad today, so going to do a new game. I wonder if you can guess what it is?
Good luck! And to help you out: it is one of the games on this list. There's more of a clue in this picture than you think. Be creative!