Topic: Any game with a large player base?

I tried Warframe and I believe the game is great, especially for it being free. I ran into an issue after leaving the starting planets, it was difficult to find other real players and do matchmaking. I was looking at Diablo 3 but I am curious how big the player base is and if I will have any people to match make with. Any other large online games as an option other than Splatoon 2 or Rocket league?

@crazylegs104 I ran into that problem with Warframe and left partially for that reason.

Rocket league.
Mario kart
Smash
Mario tennis aces
Splatoon 2
Fortnite
Tetris 99

@Meehanuk do you play on a specific difficulty or specific rift farming? I have heard that some people can find groups easy if the difficulty is higher or you rift farm.

@1UP_MARIO rocket league has been solid for a long time, hoping Splatoon 2 can keep the fan base as well.

Rocket League has cross-play, I think that's why that game is still going like that. Sadly Warframe doesn't have cross-play, they said they would look into it at some point.