This is a truly great game, but I think it is misplaced on this list.  I'm aware that there is an online version,  but this is by its nature a social game.  Plus, despite all its variations, (And I'm talking about the original Eon version with , taking into account the 9 expansion sets, 75 aliens, 75 flares, 100 moons. and 6 planet hex powers.  NOTE:  The planet hex powers from Expansion Set 9 I have rarely used.), it is really a board game.  There is no game master or dungeon master.  Play is determined by the Destiny Pile (instead of dice) and then proceeds to the left after a turn is over.  There are planet hexes and tokens representing your army.  There is a monetary system (Lucre- Expansion Set 6 or 7).  I will be adding it to its rightful list, the one for board games, soon.

It is a one-of-a-kind game where you mind meld with an alien and take over the universe. 20,475 different 4 players alien combinations. Its NEVER the same twice.