mp_deathrun_boss addon

I've finally fixed this. This includes secret, skybox, traps etc..

ALL traps work now. Updated old game. Sniper room refreshed and updated slightly, removed one bounce off the map and replaced with just a jump down. Added the song + a loading screen. Changed two bounces also. Includes 6 traps instead of 2(..?) on the broken version. Acti cannot kill himself anymore while jumping down anything. If you happen to find any kind of bug or glitch that happens constantly, please tell me about it and i'll fix it.