Aryan Patel died after the larger boy landed on him at Megazone Laser Tag in the city in the Midlands region of England in April.
An inquest into the death earlier this week concluded Aryan's death in April was accidental.
Following the inquest, Aryan's father, 45-year-old IT worker Rajendra Patel, who went to his son's aid during the incident said, "We have lost a loved one who can never be replaced and will never be forgotten."
The teenager told Leicester Coroner's Court he did not realise Aryan was there because of his slight build and the poor lighting in the room.
More From This Section
Aryan, who was very small for his age, was groaning and appeared to be having a fit as he was carried to the arena's reception after the collision with the other player and was taken to Leicester Royal Infirmary.
Leicester City Council told the court it will be taking no action against Megazone because it was satisfied with the company's health and safety procedures.
"We are bitterly disappointed that Megazone and the Leicester City Council have not looked at implementing changes into how players are more suitably grouped," the Patel family said.
"We would have hoped that Megazone would have taken this unfortunate incident to ensure that no other family will have to go through the pain and anguish that we are going through now and in years to come," the family statement said.