In Oil Field, players act as rivaling energy companies. They try to reach the newly built oil field first and thus get the lucrative deal with the oil company and win the game.
First players shuffle their land card decks and build a map for the game. Each player has identical 31 land cards and together they form a 21x3 (for two players) or 14x9 (for four players) map. In the middle of the playing area is the oil field that players try to reach. The land cards have two playable sides and they have different rocks/obstacles in them so basically each player faces equally difficult landscape which to overcome.
Now players start to build their oil pipes. On their way to the oil field they need to turn the land cards to make the route possible, flip land cards around to hopefully reveal more suitable obstacles or switch land cards with adjacent ones.
Many land cards have some specialties. Yellow-edged has to be turned around once player builds a pipe next to it, some give extra action and some force player to flip surrounding cards around.