Close case 7: Buy Hard.

Take a photo at the photobooth.

Fully explore the vents.

Remember neglected responsibilities.

Play games in the arcade.

Close case 9: Baits Motel.

Examine all of the museum's contents.

Call Santa out in the diner.

Close case 8: Polterguys.

Get Dooley a souvenir hat.

Close case 1: Malice In Wonderland.

Close case 2: Tome Alone.

Close case 3: Disorient Express.

Close case 4: Police Farce.

Close case 5: Loch Mess.

Close case 6: Don Of The Dead.

Read all the book titles in the library.

Listen to all of Dick Brickman's radio shows. Featuring Dick Brickman.

Take all of the Turner's calls in the Bloodwolf HQ.

Use the kango hammer on everything in the sewers before advancing.

Search 10 bins.

Examine 8 cars.

Slack off the job and read a trashy mag in each case.

Spot the Darkside SkyBeast.

Complete the virus minigame in three steps.

Enter the Cursed Lodge.

Give Laxatives to McKing.

Check Roy's Alibi.

Listen to all of John's gags.

Watch the credits to the end.