The Age of Rail - La Pampa & Allegheny expansion introduces new maps as the fourth installment in the Iron Rail Series. Designed for 3-6 players, the game plays in approximately 60 minutes and features a point-to-point map system. Players invest in multiple railroad companies by purchasing shares, with higher ownership increasing potential dividend earnings. Track construction connects cities and stations, requiring strategic network expansion to optimize revenue. Gameplay revolves around a limited action system, requiring players to prioritize moves that balance short-term gains with long-term objectives. The economy is shaped by player decisions, investments, and railroad company performance. Dividends are distributed based on company success, with the winner determined by total money accumulated after six dividend rounds, including a final bonus payout.