Shin guards from Dr. Freeman's Hazardous EnVironment suit from HL2.
Half-Life 2 - HEV Suit Shin Armor Papercraft [Download]
Half-Life Lambda Logo Papercraft [Related Posts]
Half-Life Glock 9mm Handgun Papercraft
Portal - Weighted Companion Cube Papercraft
More Half-Life
Headcrab Papercraft 2