http://www.newgrounds.com/portal/view/533001
Sneaky ending: Use file, use it on doors, beat guards, use chair, go right, use plungers

Legal ending: Use cellphone, and use disguising bag as proof

Badass ending: Use drill, use crowbar, press down arrow, then left and click when duel is on

LOL BRAWL REFERENCE: Dont click left arrow but pick other one

Lots of Effort: list of fails:
1. File, Window
2. File, Door, Nothing
3. File, Door, Click, Nothing
4. File, Door, Click, Click, Grenades
5. File, Door, Click, Click, Chair, Go left
6. File, Door, Click, Click, Chair, Go right, rope
7. File, Door, Click, Click, Chair, Go right, parachute
8. File, Door, Click, Click, Chair, Go right, jetpack
9. Rocket Launcher
10. NrG drink
11. Teleporter
12. Drill, Opacinator
13. Drill, Crowbar, Nothing
14. Drill, Crowbarr, Up Arrow
15. Drill, Crowbar, Down Arrow, Nothing
16. Drill, Crowbar, Down Arrow, Down Arrow
17. Drill, Crowbar, Down Arrow, Left Arrow, Nothing
18. Celphone, Wrong Evidence

DONUT WANT!
Collect all donuts:
Fail 5: On table where cups are
Fail 10: Chief holds one donut
Fail 12: One is on shelf, other is with cop who is on left on top most floor (he is looking on it)

EDIT:
Secret Medal: Click on sun after credits in Sneaky Escape