Limbo and TF2
 

Here's some de-made screenshots from the PC version of Limbo in EGA (see original) and the Amiga's 32-color mode (see originals here and here):

http://dl.dropbox.com/u/13771683/Ret...IMBO_Cells.png

http://dl.dropbox.com/u/13771683/Ret...IMBO_Cliff.png

http://dl.dropbox.com/u/13771683/Ret...O_Hung_Man.png

Also, here's some some de-made screenshots from that famous F2P shooter Team Fortress 2 in the Amiga's 32-color mode (see originals here, here, and here)

http://dl.dropbox.com/u/13771683/Ret.../TF2_Heavy.png

http://dl.dropbox.com/u/13771683/Ret...F2_Soldier.png

http://dl.dropbox.com/u/13771683/Ret...F2_TheTeam.png

From Dust in 32 Colors
 

To celebrate the upcoming release of Eric Chahi's game From Dust, I've de-made 6 screenshots from the PC version of the game in the Amiga's 32-color mode.

A village under attack by a volcano - and somehow surviving! (see original)
http://dl.dropbox.com/u/13771683/Ret...st_Volcano.png

A dramatic reveal of a desert village (see original):
http://dl.dropbox.com/u/13771683/Ret...lageReveal.png

A mysterious statue on a desert island (see original):
http://dl.dropbox.com/u/13771683/Ret...t_Tropical.png

A bizarre scene which, to me, looks like it was taken underwater! (see original)
http://dl.dropbox.com/u/13771683/Ret...st_Surreal.png

A dancing villager (see original):
http://dl.dropbox.com/u/13771683/Ret...DancingMan.png

Finally, the player holding a sphere of sand above a vast desert environment (see original):
http://dl.dropbox.com/u/13771683/Ret...t_Arrabian.png

RAGE and Bastion
 

Here's some 32-color Amiga screenshots from id Software's upcoming FPS game RAGE:

Battling Octo-Man (see original):
http://dl.dropbox.com/u/13771683/Ret...ge_Octoman.png

An incoming Beserker-type dude (see original):
http://dl.dropbox.com/u/13771683/Ret...e_Beserker.png

An enemy dude trying to get on top of you (see original):
http://dl.dropbox.com/u/13771683/Ret...actoryDude.png

Also, here's some screenshots from the indie action-RPG game Bastion done in the style of the SNES (512x448 hi-res mode, 256 colors):

Battling some sort of ball-like foe (see original):
http://dl.dropbox.com/u/13771683/Ret..._BallThing.png

The hero approaching a blacksmith's (see original):
http://dl.dropbox.com/u/13771683/Ret...Blacksmith.png

A battle with some ghouls (see original):
http://dl.dropbox.com/u/13771683/Ret...GhoulFight.png

The 32-Color Human Revolution
 

To celebrate the imminent release of the eagerly-awaited game Deus Ex: Human Revolution, I've taken six official screenshots and de-made them into 640x400 and the Amiga's 32-color palate. (In all seriousness, who knew this game could look so good using only 32 colors?)

A law-enforcement battle in a city harbor (see original):
http://dl.dropbox.com/u/13771683/Ret...Ex3_Harbor.png

A beautiful skyline vista (see original):
http://dl.dropbox.com/u/13771683/Ret...x3_Skyline.png

A back alley made rather moody when using only 32 colors (see original):
http://dl.dropbox.com/u/13771683/Ret...MoodyAlley.png

A scene of an aircraft in flight (see original):
http://dl.dropbox.com/u/13771683/Ret...3_Aircraft.png

A view of a street from a Chinese city (see original):
http://dl.dropbox.com/u/13771683/Ret..._Chinatown.png

Finally, a view of Adam Jensen lining up his sights on some foes in a TV station (see original):
http://dl.dropbox.com/u/13771683/Ret...rTVStation.png

Rocks with Faces and Machines with Malice
 

Here's some screenshots from the indie game Rock of Ages de-made into 320x200 and the Amiga's 32-color mode (see originals here, here, and here)

http://dl.dropbox.com/u/13771683/Ret...DonQuixote.png

http://dl.dropbox.com/u/13771683/Ret...s_Leonardo.png

http://dl.dropbox.com/u/13771683/Ret...es_Mideval.png

Also, here's some screenshots from the upcoming indie shooter Hard Reset de-made into 640x400 and EGA (see originals here, here, and here)

http://dl.dropbox.com/u/13771683/Ret...ntMetalBug.png

http://dl.dropbox.com/u/13771683/Ret...GiantRobot.png

http://dl.dropbox.com/u/13771683/Ret...antMachine.png

Well I wanted to suggest you to reduce resolution as well, since those pictures with high resolution still looks very good even in 32 colors :)

On some of the images in question, it's because I lacked the knowledge to make them look decent at lower resolutions. Mostly, though, it's because I'm imagining things as they might have been had they been released later on. What I mean, for example, the Hard Reset screens are similar to the EGA mode Sierra used on some of their VGA-based video games, as those games used 640x400 whenever they used EGA. Not as pretty, but the higher-res mode gives the EGA mode more room to dither. The same idea I often apply to high-res images because I imagine they were mainly released in, say, VGA or the Amiga 128-color mode, but they had a compatibility mode for older computers.

Mechs and Steampunk
 

Here's some screenshots from the still-in-development game Hawken done in 320x200 and use the Amiga's 32-color palette (originals can be found here, here, and here):

http://dl.dropbox.com/u/13771683/Ret..._Firefight.png

http://dl.dropbox.com/u/13771683/Ret...JetBrigade.png

http://dl.dropbox.com/u/13771683/Ret...esertWorld.png

Also, here's some screenshots from the F2P game Iron Grip: Marauders which are also in 320x200 and use the Amiga's 32-color palette (originals can be found here, here, and here):

http://dl.dropbox.com/u/13771683/Ret...llTownBoom.png

http://dl.dropbox.com/u/13771683/Ret...rs_BigBoom.png

http://dl.dropbox.com/u/13771683/Ret...alleyFight.png

Sonic Generations
 

Here's some screenshots from Sonic Generations done in the same resolution and color palette as the Sega Genesis (320x224 pixels, 32 colors) (originals can be found here, here, here, and here):

http://dl.dropbox.com/u/13771683/Ret...ons_Retro1.png

http://dl.dropbox.com/u/13771683/Ret...ons_Retro2.png

http://dl.dropbox.com/u/13771683/Ret...tions_New2.png

http://dl.dropbox.com/u/13771683/Ret...tions_New1.png

X Rebirth
 

Here's some screenshots from the upcoming space simulator X Rebirth done in the Amiga's 32-color mode at 320x200 pixels (see originals here, here, and here):

http://dl.dropbox.com/u/13771683/Ret...SolarArray.png

http://dl.dropbox.com/u/13771683/Ret...aceHighway.png

http://dl.dropbox.com/u/13771683/Ret..._HydroFarm.png