Free-to-play FPS Blacklight: Retribution is pulling the plug on its mostly-empty servers on March 11th, so say developers Hardsuit Labs via Reddit. The cyberpunk team shooter had a good run, first launching in 2010 as the commercial Blacklight: Tango Down (and the developers were called Zombie) before rebooting as Retribution in 2012. For its final month on PC (the PS4 version is still safe), Hardsuit Labs…