Before the ukranian team start developing their game: STALKER. I thinking about a Stalker game, but not like this. This is only a Doom-clone. But the REAL Stalker is very different. (Read the book! Strugatzkiy: Picnic on the roadside)
And OFP is a very good platform to this game. The main character walking, seaking in the ZONA (in OF a whole island) and there is no mosters and zombies and any other stupidity, but there are a lot of TRAPs!
The traps are invisible or almost invisible. The good stalker never run: sneak and watch. If the player run, can't see the traps... And the traps are deadly.
In the REAL Zona there is no mutant-rats and enemies. The Stalker no need gun! But he need tools for surviving. A lots of marker and food. The marker is need to throw it and it's moving can show the trap. If the marker flying normaly, the way is safe, but if it moving extraordinary, you must change direction.
There is a lot kind of traps. And the mission is collecting extraordinary stuffs (little, unknown gadget). The first Prize is the gold ball (or the room) where everything what you want is done. I can make a good mission or campaign with this addons.
Is it possible making TRAP addons? Which invisible (or very hard seeing) and can modify the flying of object? The markers can be modified hand grenades...