This game have a LOT of refernces to Team Fortress 2 1:The needler it's like the sirynge gun of the Medic 2:In the second game the Mercenary have a Minigun i don't remember the name but is like Sasha 3:The Assasin have a aspect like the Scout and it got a bat.
I have a idea for Shop Empire 3:Shops will waste supplies (food,medicine,etc) you nedd to call a supply truck with 3 types:Small,Medium and Big.Hope this work :D