So what would happen if we got a brand new 2018 game built on the classic 3D Realms Build Engine? That's exactly what Ion Maiden is - and it's awesome. On this Extra episode of DF Retro, John sits down with 3D Realms VP Frederik Schreiber and Voidpoint co-founder Evan Ramos to chat about the creation of the game and the experience of working with the Build engine in 2018.