Never pay for a "direct download" link from a random forum. The only paid version worth your money is on Steam, and the only free safe version is on Newgrounds or Flashpoint.
: Some players opt to play specific old beta or alpha versions (e.g., v1.13.e) using external download links and file-swapping methods described in community guides. MADNESS: Project Nexus on Steam madness combat project nexus 2 download