The S.D means Sierra Delta. This event is from the NSMRS (North Shore Mountains Research Site) Play it here: https://www.roblox.com/games/5845731145/North-Shore-Mountains-Research-Site (The place has been re-opened!) This was used on UPC but it's (Kinda) IITPP. Play it here: https://scratch.mit.edu/projects/620487016 (You may need a good PC for it.) Why did I remove Sierra Delta from the Game? Well, it's because it doesn't fit well with IITPP and UPC. I know you guys liked it, but it had to be removed.
