someone knows this game?

hello people of reddit, first of all i apologize for my bad english, its not my first language hah, but i need help because im searching a game for a while and i cant find it, i just remember some things of it, its like no mans sky but waay older, the graphics are worst than the ps1 ones, like windows 98 but 3D i think?, you could travel to thousand of worlds, build your own base, house etc etc, and the incredible thing was that it wheighed like no more of 1gb/100mb or something like that, if someone knows the name, i would really appreciate if they say it to me!