M.E.R.C is a dev team that makes modifications for : HL2, TF2, CSS, HL2:DM, HL and many more games! We are the creators of the mod(s): The BooK Of Horrors and a map pack for CSS (not published anywhere yet!) and we hope to make many more if that turns out well!
No engines, games or mods appear to be published or in development by M.E.R.C. We suggest you add engines, games and mods you are developing here (or update existing engines, games and mods on the site which should be linked with this Developer & Publisher).