You do not earn Tickets (Tix) simply by playing games. Tickets were a secondary currency removed in April 2016. This answer covers historical context and the current economy.
Scams. Any site/video claiming free Tickets, Robux generators, or "Ticket hacks" is phishing, malware, or account theft. Never enter your .ROBLOSECURITY cookie or password.
Summary: Tickets are gone. Playing games earns fun, not currency. Create, trade, or subscribe to earn Robux.