Rockfish joins angel investors Bullet Time Ventures, i2A Fund and Hyde Park Angels, which provided more than $1m to Tap.me in January.

Rockfish Brand Ventures, a corporate venturing unit of advertising agency Rockfish, has made its first investment since starting in March by providing an undisclosed amount to Tap.Me a US-based in-game advertising service.

Rockfish joins angel investors Bullet Time Ventures, i2A Fund and Hyde Park Angels, which provided more than $1m to Tap.me in January.

Joshua Hernandez, chief executive of Tap.Me, said: "The Rockfish Brand Ventures team brings us more than financial backing, but crucial knowledge of the digital space…