Rio Grande Games Underwater Cities: New Discoveries Expansion – 52 Cards, 3-Layer Boards

Expand Your Underwater Cities Experience

The New Discoveries expansion for Underwater Cities invites players to dive into a richer, more varied ocean metropolis. As the first add-on for the base game, it preserves the core experience while introducing fresh decision points, new visual setups, and exciting treasure-inspired goals. Whether you’re a seasoned strategist or a curious beginner, this expansion broadens the possibilities without changing what made the base game engaging.

What’s inside and how it changes the game

The box adds substantial tangible upgrades that can change the rhythm of play. Expect new asymmetric assistants that shape early turns, starting resources that influence planning, and 52 new cards that widen the tactical palette with novel effects. The upgrade to the boards matters too: three-layered player boards bring a tactile, layered feel to planning and tracking, while four double-sided boards refresh the setup each session for higher replayability.

• 52 new cards expand choices for each round, encouraging adaptive strategies.
• 3-layered player boards offer a more nuanced way to map your city’s development.
• Four double-sided boards boost variability and re-playability across sessions.
• The Museum Of Underwater Artifacts board introduces enticing treasure-driven goals.

New metropolises and artifacts yield fresh targets to chase, helping each game feel distinct. If you enjoy the original mechanics, you’ll likely appreciate how the expansion adds depth, new routes to score, and opportunities to experiment with different combinations of resources and actions.

Who it’s for and what you can expect

• Number of players: 1–4, with playtime around 90 minutes or more depending on the group.
• Ages: 14+; a suitable challenge for fans of strategic resource management and city-building themes.
• Not a standalone game: a base Underwater Cities set is required to play this expansion.

Real-life use cases and benefits

For groups seeking greater variety, the expansion offers new pathways to approach the same core mechanisms. The asymmetric assistants add spice to the early game, while the museum artifacts board and metropolises provide new late-game goals to pursue. The larger, layered boards can help players visualize complex city layouts more clearly, potentially reducing setup friction and speeding up the initial turns in the right hands.

In practice, you may notice more strategic planning per turn, a wider range of viable build orders, and a heightened sense of discovery as new cards unlock previously unseen synergies. The design keeps the spirit of underwater development intact while inviting experimentation and tailored play experiences across sessions.