After spending quite a few hours on the Rise of the Dark Spark game, it won't play more than a few minutes without stopping... telling me that the "game data is corrupted, and needs to be deleted".
From what I can see online, it means I have to either delete the saved files of the game, or the entire hard-drive (or a restore of system files, which could automatically delete saved files). I won't lose the trophies (managed to get 27 of the 51), but it will mean starting the game from scratch and losing all the accumulated achievements, like Prime mode and any remaining challenges that accumulate to earn a trophy.
If it means losing all the game data, I probably won't bother going back to the game... it's just too much to redo just to get back to what I was.