I’m currently trying out Citizen Science by Filament Games. It was published in 2011, but the great thing about learning games is that they don’t have to be measured by the latest graphics and technology (*cough Playstation Xbox cough*). In other words, I don’t feel outdated playing the game for the first time.
The game has you travel back in time to help stop the pollution of a local lake. There is learning to be had, of course, including (from my first foray into the game) the concept of building arguments! Nice.
To check out the game for yourself, visit: http://citizenscience.gameslearningsociety.org/node/23