CHRONOCRITTERS might be the heaviest game yet from Delicious Games!

About Chronocritters, from BoardGameGeek:

Earth, 2562. Following a cataclysmic event, time and space are ripping apart at the seams. Players must help save the world by rediscovering ancient technologies, enlisting the help of robotic time-travelling, portal-building animals known as CHRONOCRITTERS. The availability of the different actions and resources will change and flow with the passing of time. Players will gain access to more locations via time portals, but they only remain stable for a short time and will begin to decay, requiring players to constantly maintain them or build anew. The player who can best master the chronocritters, and persuade the AI about their abilities, will restore reality, and win the game. -description from the publisher