With Mass Effect: Andromeda just around the corner, EA wants you to reacquaint yourself with the series for free
Promotional efforts for Mass Effect: Andromeda are in full swing. If you are unbothered by being the target of marketing, and enjoy free games, you can get Mass Effect 2 for free off Origin, at the time of writing.
Andromeda will probably be packed with references to the previous game, so it might be a good idea to freshen up. As a side note, you will not be able to get the new instalment to the series on Steam, so you can help yourself to a free copy of Origin now.