Hello today I bring my buyable ending script for black ops 1. Please note that I used Toms WaW buyable ending as a base for this so if you added that into WaW you should remember some of this a bit. I also made the script only in the zombie_MAPNAME.gsc to make it easier to add.
Step 1. in zombie_mapname.gsc add this in the main() function above: maps\_zombiemode::main();
Step 2. At the bottom of your zombie_mapname.gsc paste this functions below: Feel free to change the buyable ending quote. Please make sure to credit everyone that was a part of making his possible for Black Ops 1.