need to know wwhat poker game everyones playing and the runs to playing games lmk

ok this is where we post but wut program do i need to download to start

Pokerstars.com
They play Texas Hold'em
A/i= All in (matches that both players go all-in on the first hand)
H/u= Heads up (Two players play one-on-one)
Don= Double-up or Nothing (Top half of the tables finishes in the money, all doubling what they risked)