inside the pistol only has a bullet, guessed the stone scissors cloth, wins one only then by opens fire to opposite party, the extremely barbaric violence game, could be 18 has endured, not the good psychological quality person should better not play, mou

Write the above sentence using proper case.
Inside the pistol only has a bullet, guessed the stone scissors cloth, wins one only then by opens fire to opposite party, the extremely barbaric violence game, could be 18 has endured, not the good psychological quality person should better not play, mou