Famine robots need to eat gear upgrades, and the specific steps are as follows:

First find the gear monster on the ground or in the cave.

2. After killing the gear monster, the gear will fall and the mouse will click to pick it up.

3. After picking it up, you will click on the gear in the toolbar below and then right-click to eat the upgrade.

In the famine game, robots are also one of the characters that players can unlock by accumulating experience values, so we can know that robots can be unlocked for free. Players only need to accumulate 960 experience points to unlock the robot in the game and use it for free.