Algodoo

In memory of Opportunity, who's last message was poor battery readings and a picture of the dark sky.
Opportunity's last command was to enter sleep mode and transmit a single tone in the morning to show it was still alive.
in the morning, NASA waited patiently for the single tone, but it never arrived.
But...
we can still bring her back online if we head to mars as people in suits and fix broken devices like the heater and charge her battery, maybe even upgrading her technology.