Complex sentence: The entrance to the Kingsway Tunnel is used as the basis of a tunnel entrance in the video game Grand Theft Auto 3--during the 1990s, several members of the game's development team had worked for the Merseyside-based development company Psygnosis.
Split into simpler sentences: The entrance to the Kingsway Tunnel is used as the basis of a tunnel entrance in the video game Grand Theft Auto 3. During the 1990s, several members of the development team worked for the Merseyside based development company Psygnosis.