Ghostbusters: Spirits Unleashed Ecto Edition

You should be able to get this through regular play. To trap a ghost, throw the trap by pressing when you are near a ghost. Open the trap by going to the spot you threw the trap from, and press , then ensnare the ghost in the proton stream by keeping the cursor on the ghost as you hold . After the ghost is in the stream, drag it to the trap to capture it. Do this 25 times to get the achievement.


You can also use the training ghost in the outside area of the firehouse to easily get this one if you need it quickly