Complex sentence: Before 5Head Gaming was founded, there was another Garry's Mod server called "KxG" and it was very popular since it used PERP (Pulsar Effect RolePlay) and was the only server in Australia.
Split into simpler sentences: Before 5Head Gaming was founded, there was another Garry's Mod server called "KxG". It was very popular because it used PERP (Pulsar Effect RolePlay) and was the only server to have PERP in Australia.