The suit was designed by a dedicated team of 3D artists and illustrators including Chuck Jones, Kelly Bailey, Harry Teasley, and Derek Jenson. Although the suit is created with a helmet, Half-Life series’ main character, Gordon Freeman never really wears one. It is worn by all scientists working inside Black Mesa Research Laboratory in order to protect them from coming into contact with hazardous material inside the lab. Hazardous Environment Suit, more commonly known as HEV Suit, is an essential costume of Half-Life gaming series. The good news is at the end of Half-Life series, Freeman gets to keep the HEV suit as G-man allows him to keep it. With its healing and protecting abilities, the HEV suits serve more as a partner in the battle against Xen creatures than a mere highly optimized protective shield.
The HEV suit designed and created for the Half-Life gaming series is undoubtedly an intelligent costume.