The are no direct statements but one from his agency [1]

> The project has no blessing or support from Chris Sawyer and our view, it is both unethical and unlawful, involving infringements that may in some territories be criminal as well as a violation of Chris Sawyer's rights and those of his licensees - all of which remain reserved.

> RollerCoaster Tycoon Classic, distributed by Atari, contains RCT and RCT2 rebuilt for modern operating systems under Chris's own direction.

[1] https://forums.openrct2.org/topic/5646-how-is-openrct2-legal...