Neither method involves a native "Play Store" download. You are remote-controlling a PC.
Here is the reality of Team Fortress 2 on mobile, the truth behind those Play Store listings, and what Valve is actually doing with the IP.
: Currently, the most reliable way to play TF2 on a phone is through streaming services. Tools like Steam Link
Grab your phone, gather your team, and get ready to experience the hilarious and action-packed world of Team Fortress 2 on-the-go! Share your mobile gameplay experiences with us on social media using #TF2Mobile.
: This is a standalone community mod on Steam (PC) , not a native mobile app.