A "retro soundtrack" refers to music that is reminiscent of a previous era or time period. It typically features styles and sounds from the past, creating a nostalgic or vintage vibe. Full definition
The games retro soundtrack also works really well adding to the nice retro feel to the game. (plusxp.com)
The game features awesome first - person adventuring through tons of beautifully illustrated rooms, new and updated puzzles, in - game and Steam - based achievements as well as a full, digitally - orchestrated, dynamic soundtrack and a second retro soundtrack featuring Hiroyuki Masuno's original NES composition. (zojoi.com)
The game also uses amazing and minimalist pixel art courtesy of artist Dominik Johann and has a fantastic retro soundtrack from composer Jukio Kallio. (theverge.com)