That's right, the ENTIRE game is Free to Play for ALL for the next month and a half.
"Here at Standing Stone Games our goal is to bring joy to everyone through our games and we feel that is more important than ever. We are making all our adventures and stories open to everyone through April 30. In addition we will be running extra events for the games."https://www.lotro.com/en/friends
SWG (pre-cu) - AoC (pre-f2p) - PotBS (pre-boarder) - DDO - LotRO (pre-f2p) - STO - GnH (beta tester) - SWToR - Neverwinter