SAN FRANCISCO, CA — (Marketwired) — 04/23/13 — Unity Technologies, provider of the Unity multi-platform engine and development tools, today announced a multi-year strategic partnership with Bally Technologies, a leader in slots, video machines, casino-management, and networked and server-based systems for the global gaming industry. By combining the power of the Unity engine with the breadth and depth of Bally Technologies- offerings, Bally Technologies will be able to build the most innova