Delta was Thalamus' second game for the C64, also programmed by Stavros Fasoulas. Delta is a horisontal shooter with 40 short stages, with a power-up system similar to that of Gradius. By shooting down a whole squadron of enemies, the player got a "credit", and the more "credits" the played had when the "bonus block area" arrived, the higher bonus weapon the player could take. Un-lit bonus weapon blocks were treated as walls.
The title and game music was written by Rob Hubbard, where the title music was inspired by the music from the movie "Koyaanisqatsi".
Stavros Fasoulas: Design, programming
Rob Hubbard: Music