Independent Melbourne-based development house Transmission Games has laid off more than 20 staff members, Gamasutra has learned from multiple reliable sources. According to one source, the employees were notified today, Thursday, October 1. Founded in 1996 and one of the longest running Australian studios, Transmission Games was known as IR Gurus, until it adopted its current moniker in 2008. Despite the redundancies, the studio has been busy in 2009. This month, the company released the …