The Real Ghostbusters was an arcade game based on the cartoon series of the same name released by a Japanese game company, Data East in 1987.
After the success of the Ghostbusters film (and indeed of the licensed game from Activision) a cartoon TV series was created, which this game is based on. The player controls a Ghostbuster, who has 10 levels full of ghosts to clear up.
The Ghostbusters fight off hordes of nightmarish creatures with energy guns which reduce the monsters to harmless ghosts which can then be captured with beams from their proton packs. Power-ups available included stronger basic shots, a force field that makes the Ghostbuster invincible for several seconds, and an item that summons Slimer to throw himself in the way of attacks.