Splinterlands was multiple times the biggest DApp in the HIVE Ecosystem at it's peak and to this day it's easily the front runner Game DApp on HIVE.
I'm biased as I own a lot of Splinterlands assets myself, but Splinterlands definitely deserves support from Hive for what it offers back to the community.
Very strong community, lovely people, great team and an amazing product.
I play Splinterlands every single day!