Setup
Players draft 6 Corporation cards to the left, then keep 1.
Basic Corporations are removed from the game entirely before setup. Each player is dealt a number of Corporation cards equal to the number of players (6). Players draft these cards by passing them to the left. After the draft, each player keeps exactly 1 Corporation card. The remaining Corporation cards are collected, shuffled, and returned to the Corporation deck.
Setup
Players draft 6 Prelude cards to the right, then keep 3.
Each player is dealt a number of Prelude cards equal to the number of players (6). Players draft these cards by passing them to the right. After the draft, each player keeps exactly 3 Prelude cards. The remaining Prelude cards are collected, shuffled, and returned to the Prelude deck.
Setup
All discarded/unused Corporation and Prelude cards are reshuffled into their decks after selection.
After all players have selected their final Corporation and Prelude cards, all discarded and unused Corporation and Prelude cards are gathered and shuffled back into their respective decks. This ensures that cards like the Prelude card 'Merger', which require drawing from those decks during initial play, have cards available to draw.
Turn structure
Corporations are played in player order, then project cards are handled, then Preludes are played one at a time in player order.
After selection, cards are played in the following sequence: (1) In player order, each player reveals and plays their Corporation card. (2) Players then discard unwanted project cards or pay to keep them, per standard rules. (3) In player order, players play their Prelude cards one at a time (not all at once), cycling through players until all Preludes have been played.
Setup
The Base and Elysium boards are placed side by side and treated as a single continuous planet surface.
The Base board and Elysium board are placed side by side. Together they represent the full surface of Mars. All tile placement, adjacency, and area rules apply across both boards as if they were one seamless map. Players may place tiles and interact with hexes on either board unless otherwise restricted.
Special
Arsia Mons appears on both boards but is treated as a single hex.
Arsia Mons is a named location that appears on both the Base board and the Elysium board. In this variant, both instances are treated as the same single hex. When a tile is placed on Arsia Mons on one board, a matching tile must also be placed on the Arsia Mons hex of the other board to represent it. For all game rules (adjacency, bonuses, scoring, etc.), this hex is counted only once, not twice.
Special
The rightmost 2-Plant hex (Base board) and leftmost 2-Plant hex (Elysium board) are treated as the same hex.
The rightmost 2 Plant production hex on the Base board and the leftmost 2 Plant production hex on the Elysium board are treated as the same single hex. When a tile is placed on one of these hexes, a matching tile must also be placed on the corresponding hex on the other board. For all game rules, this hex is counted only once, not twice.
Restriction
Duplicated seam hexes and their tiles are counted only once for all game rules.
The duplicated hexes at the seam of the two boards (Arsia Mons and the two Plant hexes) are each treated as a single hex for ALL game rules. This means they count only once for adjacency checks, tile bonuses, milestone thresholds, award scoring, victory point calculations, and any other rule that counts hexes or tiles. The mirrored tile on the other board is a visual representation only.