Power Grid and Puerto Rico are bad with fewer than 3 people. They don't even list that number of players on the box. You have to delve into strange variants that muck with important aspects of the game (like the bidding wars in Power Grid - pointless with 2 people). Pandemic will only be a little fun with two people and you have to be really bored to play it solo. You need to get another board game buddy, my friend. Otherwise, forsake those and order Dominion - great with 2, 3, or 4 players.