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UncleGamer

Major
27 Badges
Jan 14, 2017
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  • Hearts of Iron III
  • Leviathan: Warships
  • Crusader Kings II
  • Stellaris: Synthetic Dawn
  • BATTLETECH: Heavy Metal
  • BATTLETECH: Season pass
  • Surviving Mars: First Colony Edition
  • BATTLETECH: Flashpoint
  • Surviving Mars: First Colony Edition
  • Shadowrun: Hong Kong
  • Shadowrun: Dragonfall
  • Stellaris: Distant Stars
  • BATTLETECH - Backer
  • BATTLETECH - Beta Backer
  • BATTLETECH - Digital Deluxe Edition
  • Surviving Mars: Digital Deluxe Edition
  • Stellaris: Apocalypse
  • Stellaris: Humanoids Species Pack
  • Surviving Mars
  • BATTLETECH
  • Stellaris - Path to Destruction bundle
  • Stellaris: Leviathans Story Pack
  • Stellaris: Digital Anniversary Edition
  • Hearts of Iron IV: Cadet
  • Stellaris
  • Pillars of Eternity
  • Stellaris: Distant Stars Pre-Order
So what do you have to do to play a friend in PVP if they game is unmodded but your modded.

I renamed the mod folder and then verify game files to restore them to default and it still saves my game is modded.

Do I need a clean install?
 
I haven't tried it myself, but what you've done sounds to me like it ought to work.

Are you perhaps running into the known issue where users with the Flashpoint expansion aren't able to play vs. those without?
 
depending on what platform you got battletech from you might be able to install a second copy via paradox launcher