MEEM is a mod that changes the ending of Mass Effect 3. The new ending, which is more in accordance with the dark plotline of the game, has a different conversation between the hero and the catalyst. This mod changes the entire ending, including all of the epilogue scenes and the model of the catalyst. This means that the story that you have been reading is not the story that you will actually play. The story that you will play is completely different. The new ending is darker and more mysterious.

MEEM is not an official modification of the game. The developers are not affiliated with the game's publisher, and they do not have any affiliation with the game's developer.