do what you did in adminop, add some weapons.
like put the Egon in the game but one on each map *i no this means you will have to edit maps but it will be on ur server only unless u can figure how to get it so people can download it, but anyways there is only one on each map in a VERY secret place *also might have to edit*

for an e.g. say ur a map and ur running then u see a pic on a wall and a certain picyure you can destroy and jump up in there and grab the egon

make the health of the breakable REALLY high so that if grenades are going of or even slam it will take ALOT to destroy it

you can add more classic games also