Shadow Complex (XBLA 2009/Multi, 2015 (Remastered)) - ARPG/Metroid-like hybrid 

Batman: Arkham Asylum (PS3/XB360/PC, 2009/PC, 2010 (GOTY Edition)) - 3D Zelda-like
Ore ga Omae o Mamoru (I Will Protect You)(DS, 2009) - ARPG-ish
Knight 'n' Grail (C64, 2009)
LostWinds 2: Winter of the Melodias (WiiWare, 2009) - Zelda-like?

 

Chibi-Robo: Clean Sweep/Okaeri! Chibi-Robo! Happy Richie Oosouji (NDS, 2009)? - fan transl
Aztaka (PC, 2009)? - ARPG
​​I Dig It Expeditions (iPhone/iPod, 2009)?
​Saira (PC, 2009)?

Castlevania: Dawn of Sorrow (Mobile, 2009)?
Penguin no Mondai: Tenkuu no 7 Senshi (DS, 2009)?
The Deep (iPhone/iPod, 2009)
Muramasa: The Demon Blade (Wii, 2009) - key gating only?
The Maw (PC/XBLA, 2009)? - 3D AA/Puzzle, Level-based?, Similar to A Boy and his Blob and Kirby
In 60 Seconds (PC, 2009)?
Craz'd (PC, 2009)? - Collectathon?
​Cat Planet (PC, 2009)
Jable's Adventure (PC, 2009)
William & Sly (Newgrounds.com 2009) - Collectathon
Level Up! (Newgrounds.com 2009)
​Inferus (PC/XBLA 2009)?
​
Outliers: 
The Legend of Zelda: Spirit Tracks (DS, 2009)?
A Boy and His Blob (Wii, 2009/Multi, 2016)? 
​Legend of Princess (PC, 2009) - Demo only (one dungeon)
Trine (PC, 2009)? - Puzzle/ARPG?, 2-player coop
​Koumajou Densetsu Scarlet Symphony (PC, 2009)? - Touhou/CV fan game, Level-based
GuitarFreaks & DrumMania V6 (Arcade 2009)? - Joke?