Left 4 Dead: Gemini Strain.

Chapter XXVI: Bite the Bullet – Adam

Cassius smiled to himself wistfully as he watched Adam leave the room with a look of defeat. He wanted to laugh again at the threat Adam launched before he left but that would be pointless on his own ears alone. He stretched his arms and yawned long and loud. He wanted to make his way back up to the tower, not because he wanted to ring a bell again. For other reasons.
The journey back up was longer than he expected. Hoping to access it from the roof again he was disappointed to see that the structure he used as a step down had collapsed, probably because of the additional weight that Adam had added. With a dismissive shrug he decided to go it the old fashioned way.
He clicked his tongue at the mess a grenade had made of the stairway up to the top. Looking carefully, he climbed the rubble with dexterity and leaped up to catch the end of the stairway. Proceeding to climb the debris he made his way in the circle upwards and climbed the hatch. Almost immediately once he looked at the now motionless bell he felt the urge to chuckle and did such, even as he looked at the still breathing body that laid in their own pool of blood.
He seemed to still be conscious the way his eyes followed Cassius' movements in the circle he was walking around in. Cassius decided to just stop moving around the man and humor him by stopping and staring into his eyes whilst a grin played on his face.
"Still breathing?" Cassius asked with mock amazement and concern as the man gave him a withering look from his motionless body. The man was pale from the loss of blood and prone because of his injury. "A shame really in your case, I was hoping that it would have killed you instantly." He thought on those words for a moment in his head before he told the dying man his thoughts. "Ya know, maybe I just wanted to know that you would suffer."
"You...bastard." the man said in choked breaths. Blood if not already coagulated came oozing out of his mouth. Cassius chuckled again.
"I appreciate the way you help me with that plan of mine, don't get me wrong I had no intention of killing you...initially. I couldn't have you harming Adam though."
It seemed that the man wanted to say something in response but the blood in his throat muffled his words. That did not bother Cassius at all. He leaned closer, making sure that the knife was firmly in his grip as he roughly grabbed the man's head.
"I'm not too sorry about having to do this to you, Kai." he whispered in his ear as he deftly slit the man's throat. What little blood that was left in his body flowed out in a crimson stream. With a sigh he dropped the now lifeless body and stood up with another stretch and another yawn. The blood on his hands really did not make any difference to him.
His focus now was to monitor Adam and his group, searching for a moment to take action. A cruel smile replaced his smirk. This would indeed be fun.