Title says it all really http://www.neogaf.com/forum/showthread.php?t=338867&page=228

QuickFire Artiste

Fire 40 paintballs in under 5 seconds

Rexecutioner

Destroy the Metal Gear REX boss

Ace Act 3 and Act 4

Ace Act 3: The Mission and Act 4: The Level Factory

Ace Act 5: The Boss

Ace Act 5: The Boss

Paint Splurge

Fire 5,000 paintballs

Diamond Hunter

Destroy the 5 hidden target diamonds in Act 4: The Level Factory

Thrifty Painter

Complete Act 3: The Mission firing less than 125 paintballs

METAL GEAR SOLID® Booty Master

Collect all of the METAL GEAR SOLID® prize bubbles

Paint Sharer

Publish a level containing the METAL GEAR SOLID® Paintinator Powerup

Edit: messed up the title I think you can work out that it has nothing to do with Gar, whoever he is.

Looks quite nice actually

those are trophies =)