Under the Influence is a third party supplement for Masks: A New Generation by Magpie Games. This PDF contains 15 Playbooks including the 10 found in The Worst Generation, the three found in The W.A.R Book, and The Liminal and Broker, which can only be found in this collected volume.
This is a companion discussion topic for the original entry at https://rpg-trader.com/products/2633/under-the-influence