when u make ur game and u get the unity icon when u try to play it first saying powerd by unity how can u change tht to somert like ur game company name or something plz help me plz. 
Please, use punctuation marks.
The logo appears because you are using trial/free version of Unity.
You need to buy Unity if you want to see the icon (and for own sake ).
if you dont mind leaving the powered by unity splash screen, you can have a separate splash screen with your logo if you make one in the first loaded scene…
if you really dont want to have that powered by unity splash screen, im affraid you will have to buy unity pro ($1500 usd)
i honestly dont know why people find it soo annoying those "made with " splash screens regarding third party game engines, some people say to make it look more “professional”, but honestly i find many AAA titles saying which engine and tech they are using without any problems
i dont really get that concept of trying to not even mention or give credit to the tool that made possible the project in the first place
seems like the intention its try to fool people saying, “yeah, i made it from scratch without help from anybody, im that great”
In the case of web player streamed games, it could be a little help (to earn more time, so Unity can load more assets) ?