Black Mesa Weapons
45 comments
ICBM with four stages
19 comments
Terrible Stands #4
31 comments
The foundry
23 comments
Shoes!
48 comments
Game of Life Cannons
25 comments
gravity illusion
45 comments
The most inefficient 'pipe' ever
30 comments
Smart Answering Machine
8 comments
Cooling Tubes
31 comments
Stickman Swimming Pool!
37 comments
Smirnagoth rebellion
37 comments
motorized sport car
38 comments
microwave
18 comments
black hole with gamma rays
41 comments