R.B.I. Baseball 21
29 Achievements
20-24h
PS4
Lone Star Series
Play a 9-Inning game TEX vs.HOU.
1.7%
How to unlock the Lone Star Series achievement in R.B.I. Baseball 21 - Definitive Guide
I'm not sure if it matters which team you use, but I used the Texas Rangers for this achievement just to be safe based on the description. Make sure the mercy rule is turned off, and start a 9 inning game against the Houston Astros. It does not matter if you are the home or away team, nor does it matter if you win or lose (though you may want to win for some progress towards other achievements). Good luck and happy hunting!