underground killers by doctor d LabelDeng Deng Where to buy Hardtunes Single tune €1.49 on Hardtunes More tracks by doctor d go boom (original mix ) Original mix · 2026-10-02 once again (original mix ) Original mix · 2026-10-02 kick it (original mix ) Original mix · 2026-10-02 message from within (original mix ) Original mix · 2025-02-11 revelation (original mix ) Original mix · 2024-10-03 More Hardcore tracks mrs. smith (original version) buzz fuzz the sign outer decay the sign outer decay chaos inside baylow chaos inside baylow