Complex sentence: Xbox Live Arcade (XBLA) is a video game download distribution service available primarily in a section of the Xbox Games Store, Microsoft's digital distribution network for the Xbox 360, that focuses on smaller downloadable games from both major publishers and independent game developers.
Split into simpler sentences: Xbox Live Arcade (XBLA) is a video game download distribution service available primarily in a section of the Xbox Games Store, Microsoft's digital distribution network for the Xbox 360. It focuses primarily on smaller downloadable games from both major publishers and independent game developers.