Vanishing Act (1986)
and maybe
Les liens de sang (1978)
Spock, the women on Vulcan are logical. it's the only planet in this galaxy that can make that claim

Harakiri (1962)
Mother (2009)
Pieta (2012)
A Scanner Darkly (2006)
Clean, Shaven (1993)

F For Fake (1974)

The Holy Mountain (1973)
Old Boy (2003)
Café (2011)
In the Mouth of Madness (1994)
Barton Fink (1991)

Witness for the Prosecution (1957)

• Old classic.
  Sleepaway Camp (1983)
  Orphan (2009)
  Soylent Green (1973)
  Frailty (2001)
  Primal Fear (1996)
  Oldboy (2003)
  Angel Heart (1987)
  American Psycho (2000)
  Gone Baby Gone (2007)
  Friday the 13th (1980)
  The Usual Suspects (1996)
• Winner!
  The PRESTIGE (2006)
• Winner!
  ENJOY!
  ASIF

Malice (1993)
Spock, the women on Vulcan are logical. it's the only planet in this galaxy that can make that claim

Incendies (2010)
Magnolia (1999)
The Past (2013)
A Second Chance (2014)
After the Wedding (2006)

In addition to the already mentioned excellent titles, you may want to check out:

• Dirty Rotten Scoundrels (1988) - recommended!
• Mission: Impossible (1996)
• Shattered (1991)
• From Dusk Till Dawn (1996)
• Unbreakable (2000)
• Cypher (2002)
• El orfanato (2007) a.k.a. The Orphanage
• Abre los ojos (1997) a.k.a. Open Your Eyes
• Angel Heart (1987) - maybe; R-rated
• Color Of Night (1994) - maybe; R-rated
• El maquinista (2004) a.k.a. The Machinist
• Contre-enquête (2007) a.k.a. Counter Investigation
• Derailed (2005)
• Incendies (2010) - maybe; might be a tad too depressing for some viewers.
• A Beautiful Mind (2001)
• Life Of Pi (2012)
• The LEGO Movie (2014)

Nine Queens (2000)

Memento, Eternal sunshine of the spotless mind, Donnie Darko

Fight Club (1999)
The Others (2001)

Lucky Number Slevin and Memento

Kill List
Tell No One
Diabolique
Sleep Tight
Tenebre
Deep Red

And Then There Were None (1945)
/ René Clair. Nothing can match the surprise of this movie based on Agatha Christies masterful novel.
The Last of Sheila (1973)
Night Moves (1975)
Hair (1979)
D.O.A. (1950)
Witness for the Prosecution (1957)
Frailty (2001)
Les rivières pourpres (2000)
(The Crimson Rivers)
Ne le dis à personne (2006)
(Tell No One)
Nueve reinas (2000)
(Nine Queens)
House of Games (1987)
Predestination (2014)
mf
Trust me. Im The Doctor.

Deep red from Argento
We spared no expense
Si tu veux éviter un malheur, ne jette pas de chips a ton chauffeur

The Skin I Live In (2011)
Shutter Island (2010)
The Prestige (2006)
Matchstick Men (2003)
Identity (2003)
Arlington Road (1999)
Fallen (1998)
Primal Fear (1996)
A Fish Called Wanda (1988)
The Sting (1973)
http://shaunhart.100webspace.net/movies.html

The Usual Suspects and From Dusk Til Dawn are the 2 that immediately jump out.

Deliverance

Les Diaboliques and Jafar Panahi's Mirror are two of my favorites, right off the top of my head.

Favs:
https://goo.gl/XgdKv3
Feel Free to tell me what you think. Top 30's ranked.

The Crying Game
The Sixth Sense
Primal Fear
Se7en
No Way Out
The Usual Suspects
Sleuth
The Sting
Malice

My recommendations:
Training Day (2001)
Mulholland Dr. (2001)
Up in the Air (2007)
The Ice Harvest (2005)
Fight Club (1999)
Man from Earth (2007)
L.A. Confidential (1997)
Vertigo (1958)
The Score (2001)
Beowulf (2007) (it's early but it's good)
eXistenZ (1999)
Eternal Sunshine of the Spotless Mind (2004)
Dark City (1998)
Moon (2009)
Primer (2004)
A Scanner Darkly (2006)
Murder on the Orient Express (1974) (even though everyone's familiar with it by now)
Alien (1979) (again, everyone familiar with it by now, but two good twists here)
Et ses mains ourdiraient les entrailles du prêtre
Au défaut d'un cordon pour étrangler les rois

Miller's Crossing