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The player with the most cities is first; ties are broken by who owns the largest‑numbered power plant — place that player in first and continue likewise (Phase 1). (See page 3.)

Normally a player may own only 3 power plants; if you buy a fourth you must immediately discard one of your other plants and may move matching resources to your remaining plants, otherwise returned to the resource supply (not the market). (See page 3; 2‑player exception listed on page 7.)

Each power plant can store up to twice the number of resources it consumes when producing (but it still only produces the stated number of cities); hybrids may store either resource they use, ecological plants store none. (See page 4.)

Resource buying is Phase 3 and is done in reverse player order (the last player in turn order buys first); you may only buy resources for plants you own and only up to each plant’s storage limit. (See page 4.)

You may add any number of cities in a round as long as you can pay the connection and building costs, but every new city must connect to your existing network (you cannot start a second network); place your house on the lowest available price slot in the city. (See pages 4–5.)

If the supply lacks enough tokens you only place what remains (resources in the game are limited); uranium is refilled one token per specified high spaces and is never placed more than once per space. (See page 6.)