A Factorio mod: http://www.factorioforums.com/forum/viewtopic.php?f=14&t=6862
Rseding91/Force-Fields
A Factorio mod: http://www.factorioforums.com/forum/viewtopic.php?f=14&t=6862
Lua
A Factorio mod: http://www.factorioforums.com/forum/viewtopic.php?f=14&t=6862
Lua
A Factorio mod: http://www.factorioforums.com/forum/viewtopic.php?f=14&t=6862