
Stranger Think - C418, https://soundcloud.com/c418

Atomic Amnesia - kliksphilip, album Audio Criminal

The following sounds are borrowed from the Nuclearcraft mod and are open source:
End of the World
Hyperspace
Money for Nothing
Wanderer

The following sounds are from freesound.org and are licensed as free to use:

JoelAudio:
Electric_Zap_001 - https://www.freesound.org/people/JoelAudio/sounds/136542/

Halleck:
electricity - https://www.freesound.org/people/Halleck/sounds/19486/

fons:
zap 2 - https://freesound.org/people/fons/sounds/62363/
nightmare - https://www.freesound.org/people/fons/sounds/108951/

Bird_man:
Gun Shot - https://www.freesound.org/people/Bird_man/sounds/275151/

schots:
Gun Shot - https://www.freesound.org/people/schots/sounds/382735/

suonho:
MemoryMoon_space-blaster-plays - https://www.freesound.org/people/suonho/sounds/27568/

Burkay:
Laser Gun1 - https://freesound.org/people/burkay/sounds/130121/

lupalenzuela:
Machine2 - https://www.freesound.org/people/lupalenzuela/sounds/328359/

nsstudios:
laser1 - https://www.freesound.org/people/nsstudios/sounds/321102/

dobroide:
20070117.reactor - https://www.freesound.org/people/dobroide/sounds/29611/

mitchelk:
Explode001 - https://www.freesound.org/people/mitchelk/sounds/136765/

EFlexTheSoundDesigner:
Sniper Rifle/Gun Shot - https://www.freesound.org/people/EFlexTheSoundDesigner/sounds/393651/

KBarbie:
Steam Water on Hot Plate - https://www.freesound.org/people/KBarbie/sounds/118952/

panta_rei:
wind turbine rotor sound - https://www.freesound.org/people/panta_rei/sounds/200193/

LegoLunatic:
charged laser - https://freesound.org/people/LegoLunatic/sounds/151243/

kolczok:
circ_saw-06 - https://www.freesound.org/people/kolczok/sounds/198987/

kwahmah_02
bubbles2 - https://freesound.org/people/kwahmah_02/sounds/261597/

TheGertz
Socket Wrench - https://freesound.org/people/TheGertz/sounds/131200/

Ali_6868
Left Gravel Footstep 5 - https://freesound.org/people/Ali_6868/sounds/384874/
Knight Left Footstep on Gravel 2 - https://freesound.org/people/Ali_6868/sounds/384881/
Knight Left Footstep on Gravel 3 - https://freesound.org/people/Ali_6868/sounds/384882/

NoiseCollector
spacemoan - https://freesound.org/people/NoiseCollector/sounds/42232/

atari66:
beeps - https://freesound.org/people/atari66/sounds/64119/