This is the first time Sonic is free, and the lowest price since November 2015 for the other 2.
Here are the links:
Sonic: https://itunes.apple.co
Waterdeep: https://itunes.apple.co
Agricola: https://itunes.apple.co
Forgot one – Forbidden Desert $1.99 (reg $6.99): https://itunes.apple.co
2 more
Forbidden Island $1.99 (reg $4.99) https://itunes.apple.co
Caylus $2.99 (reg $4.99) https://itunes.apple.co