Best mods for ppg:

Parts and contraptions - steamcommunity.com/sharedfiles/filedetails/?id=2337159652
Nuclear playground - steamcommunity.com/sharedfiles/filedetails/?id=2484034390
Photo Mode - steamcommunity.com/sharedfiles/filedetails/?id=2263832258
Signals and Logic Gates - steamcommunity.com/sharedfiles/filedetails/?id=2504621801
Gears - steamcommunity.com/sharedfiles/filedetails/?id=2781954787
Liquid Machinery - steamcommunity.com/sharedfiles/filedetails/?id=2550340103