Help me find this game

I remember playing a great permadeath AOT game on roblox, the main lobby was the elevator room in the HQ and by going on the elevator with other people missions would start. It had a perk tree that actually unlocked good items like different skills for different classes. A lot of people were in one mission at a time when they started and dying mattered. It was very similar to Attack on Titan Revolution gameplay wise, but it was different due to having a different perk tree and lobby system. Please help me find this game it was so peak!!!!