Hay un truco para el modo contrareloj,he visto un modo pero havia otro que no ecnuetntro bueno pongo uno:
After you finish the story on Killer, you'll have the opportunity to go through again (on Killer, of course) and beat it in under one hour and twelve minutes (per W. Samuel Jones III). You could try to do it legit, in which case I wish you the best of luck. Cover and bullet curves are your best friends. However, if you wish to do it nice and quick-like, HE4VENSENT figured out a little shortcut. Start up the Time Attack mode and get to a checkpoint (i.e. Right after the cutscene where you discover the cops in your place in Act 1, when it saves). Quit out, then go to "Unlocked Acts" and select Act 9 on Killer. Go through the level and you should get it upon completion. This also works for "Dr. Lobotomy" and "Butcher would be proud" (HE4VENSENT).
--If you haven't gotten "Between Old Friends" before doing this one, you can select Cross as your character and get that achievement as well.
El otro lo estoy buscando y no lo encuentro
Edito:Y el otro que sirve para otro logro y el de tiempo:
for the achievements:
Butcher would be proud
Complete the game in "Close Combat Mode", any difficulty
and
Dr. Lobotomy
Complete the game in "Headshot Mode", any difficulty
load up a new game select either the close combat mode or headshot mode, once the level starts quit out, and go to unlocked chapters, load up the last one and complete it, it should pop
and for
Catch me if you can
1st position in "Time Attack" Ranking
get to a checkpoint, quit out, goto chapter 9 on killer difficulty and do the whole level
(thanks to paweldk for confirming glitch works for this too)