Speedrun strat:
Kill the 2 enemies in the beginning then clear the outside of the hotel in a clockwise direction, once you kill all the enemies outside enter the basement and rescue the hostage next to the "Security guard" room before entering the Security guard room I just mentioned and finally kill the enemy in the last room on the basement. After doing all that quickly head to the stair in the basement, while in the lobby room strafe left while shooting the enemies before running behind the reception desk to "find bomb" and enter the room leading to the second stair. turn left to the door (don't go to the second floor yet) shoot the enemy guarding the door you just opened, strafe right and shoot the enemy in the kitchen, strafe left and clear the toilet before quickly going to the second floor and clear out the bedroom with the grandma before finally clearing the last enemy in the second floor toilet.