I dont think its a good idea because people who comes first time in a rpg server will be owned by the others who has way more lvls than the others. It would be better when they have to fight against bots or something like UT2004. There is a invasion mode where you have to fight against monsters. With the RPG mode it fits better than against each player. So i dont think a RPG mode for CSS would be great infact it would suck to fight against a player who has 1000 Lifepoints and 1000 Armorpoints while you have only 10 LP and 10 Armor because youre lvl 1.