Is it possible to add, remove, or replace entities such as info_player start or info_player_deathmatch from a .bsp file? I've been trying to make the half life 1 single player maps coop or death match and I'm wondering if it can be done with out any original coding. I'm thinking all that I would need to do is add the necessary entities to make it playable for more than one person and then place the .bsp into the maps folder for half deathmatch. Am I right? And if so how can I edit the existing entities to allow more players? I'm pretty sure de-compiling and re-compiling won't work, but I do remember reading something about editing maps through notepad...