mod is building a game using the modkits provided with a game.. like cs is a mod of half life.. and garys mod is a mod for half-life 2.. but prey isnt a mod of doom.. they licensed the id tech4 engine and heavily modified it for their own purposes.. and i dont think anyone in pakistan can invest big enough to but idtech or unreal engine.. we are best of using a free or a cheap engine, and hiring a couple of modelers and a couple of programmers and thats the kind of team someone in pakistan could invest in..
one more thing i know level designing is a very difficult job but if you are investing in pakistan do you think we have the resources to hire a level designer? then we should also have a couple of animators, modelers, tool programmers, physics programmers, sound programmers, game programmers, graphics director, lead programmer, game director, and so on.. it costs a lot of money and becomes impractical to even talk about..