Complex sentence: Isai is predominantly a "Super Smash Bros.64" player, he became acquainted with the community surrounding its sequel, "Super Smash Bros. Melee", entering his first tournament, Tournament Go 4 (TG4), on January 19,2003.
Split into simpler sentences: Isai is predominantly a "Super Smash Bros.64" player. He became acquainted with the community surrounding its sequel, "Super Smash Bros. Melee," entering his first tournament, Tournament Go 4 (TG4), on January 19,2003.