This was the first time that Rohrer had collaborated with others on his games, he cited this collaboration as helping to "restore (his) creative momentum" for the project.
Rohrer had collaborated with others on his games. This was what he cited this collaboration as for the project. This was the first time this. This was the first time that Rohrer had collaborated with others on his games, he was helping to "restore (his) creative momentum" for the project.