dark

mystery

mystic

mystical

riddle

secret

spell

mysterious

espionage

spy

appear

reveal

disappear

area

discovery

find

found

tense

tension

moment

operative

risk

risky

situation

spying

stealth

suspense

suspension

suspenseful

suspicion

percussive

action

risking

atmosphere

atmospheric

alert

caution

danger

dangerous

game

sound

video game

reverb