Robots vs. Dinosaurs is the third game in the Army vs. Aliens series, with each game being playable on its own while also allowing for any faction in one game to be played against any faction in another or for multiple sets to be combined for team games or "last man standing" challenge matches.
In Robots vs. Dinosaurs, each player takes one of the factions and rolls all nine dice. Taking turns, players then either attack the opponent or use a special power. Dice that are used are placed into the dice cup. If a player cannot attack or use a power, he instead "rallies", rolling the dice cup and simultaneously rerolling all of his dice still in play.
The two forces have different special powers, and players want to move dice into their scoring zone to win. If five rounds pass without either player scoring, then the game ends and the player who has the most dice in his scoring zone wins.