The Mid List

What, you don't like easy games? Tired of it looking like your 5 year-old son or daughter has been playing games on your account? Fair enough, here's a list of games with achievements that take a bit more skill and/or time to complete than those on The Easy List, but not so hard you feel compelled to confirm the link between video games and real world violence. These games could take anywhere from a couple weeks to a few months to complete - either way it's long enough that you might want to consider buying instead of renting.

Xbox Live Arcade Games

• AC/DC Live: Rock Band Track Pack
  
• Aegis Wing (free!)*
• Banjo Kazooie
  
• Braid
  
• Castlevania: Symphony of the Night
• Catan*
• Contra*
• Dead Rising 2: Case West*
• Dead Rising 2: Case Zero*
  
• Doom*
• Duke Nukem 3D*
  
• Frogger*
• Gauntlet*
• Jewel Quest
• Limbo
  
• Marathon: Durandal*†
• Pac-Man
• Paperboy*
• Shadow Complex
  
• Sneak King
  
• Soltrio Solitaire*
  
• Teenage Mutant Ninja Turtles 1989 Arcade*
  
• Tetris Splash*
• Texas Hold'em*
• Undertow*
  

Xbox 360 Retail Games

• 50 Cent: Blood on the Sand*
  
• Amped 3
• Assassin's Creed
• Assassin's Creed II
  
• Batman: Arkham Asylum
• Batman: Arkham Asylum GOTY Edition
  
• Beautiful Katamari*†
• Bionicle Heroes
• BioShock
• Blacksite: Area 51*
  
• Bourne Conspiracy, The
  
• Brothers In Arms: Hell's Highway*
• Bully
  
• Burnout Revenge*
• Call of Duty 2
• Call of Duty 4: Modern Warfare
  
• Call of Duty: Modern Warfare 2
  
• Call of Juarez*
• Conan
  
• Condemned: Criminal Origins
• Condemned 2: Bloodshot*
  
• Crackdown*†
  
• Darkness, The*
• Dark Sector*
• Dead Rising
• Dead Rising 2*
  
• Dead Space
• Dynasty Warriors 5: Empires
• Eat Lead: The Return of Matt Hazard
• Elder Scrolls IV: Oblivion, The†
• Enchanted Arms
• Enslaved†
• Fable II*†
• Fallout 3†
• Force Unleashed, The*†
• Full Auto*
  
• G.I. Joe: The Rise of Cobra
• Ghost Recon Advanced Warfighter 2*†
• Godfather, The†
• Guitar Hero 5*
  
• Gun
  
• Halo 3*†
• Halo 3: ODST*
• Halo: Reach*†
• Hitman: Blood Money
  
• Hot Wheels: Beat That!
• Incredible Hulk, The
• Just Cause
• Just Cause 2
• Kinect Adventures* (k)
• Kinectimals (k)
  
• L.A. Noire†
• Left 4 Dead*†
• Left 4 Dead 2*†
  
• Legendary*
• LEGO Batman
• LEGO Indiana Jones
• LEGO Star Wars II
  
• LEGO Star Wars: The Complete Saga*
• Lips†
• Marvel vs. Capcom 3*
  
• Marvel: Ultimate Alliance (Gold Edition)
  
• Need for Speed: Most Wanted
• Ninety-Nine Nights
• Orange Box, The*
• Outfit, The*
• Portal 2*
  
• Prey*
  
• Prince of Persia†
• Quantum of Solace*
• Rainbow Six: Vegas 2
  
• Rock Band 2*
• Scene It? Box Office Smash!*†
• Scene It? Bright Lights! Big Screen!
• Silent Hill: Homecoming
  
• Simpsons Game, The
• Skate 2*†
• Spider-Man: Web of Shadows
• Splinter Cell Conviction*†
• Splinter Cell Double Agent*
• Star Trek Legacy*
  
• Star Wars: The Force Unleashed†
  
• Stuntman: Ignition*
• Tetris Evolution*
• Thrillville: Off the Rails
  
• Tomb Raider: Legend†
• Tomb Raider: Anniversary
• Tomb Raider: Underworld†
  
• Tony Hawk's American Wasteland
• Two Worlds
  
• Velvet Assassin
• Viva Piñata
• Viva Piñata: Trouble In Paradise*
  
• X-Men Origins: Wolverine
• You're In the Movies

* requires help with online achievements for completion
† requires downloadable content (DLC) from Xbox Live for completion
(k) requires Kinect

Also: The Easy List -- The Hard List