Which star wars PC game it was in early 2000?

ok , i used to play a PC game on windows in early 2000 

it was a star wars game in which there used to be a robot which we could even paint ,

we needed to collect 2 gears and put it in a bridge which moved up and down and with all 2 gears assembled the bridge finally moved to the top to lead us to a higher cliff ...

the ladder on which the robot used to run also was automatic sort of like escalators 

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