Libc and X-window problem ..... i think !

[x_mot]

Hello Every one

here a :popcorn: not to get bored while reading :lolflag:.

first of all I'm a new on Ubuntu and i'm using 11.04 , so i dont know any thing about it if i must say.
I want play a game called Tibia , they have a client for Linux and i downloaded it , it was .tgz file and i extract it , then i have a folder contain an executable file and other files , the problem is when i open the file , nothing happens .
i went back to the game requirements and here they are


Linux with libc version 6 or later
X-Window system installed
Hardware accelerated graphics driver
65 MB free hard disk space
A connection to the internet

i dont understand or i dont know the frirst 3 of it:) , and how i get them , so please of any one know how , please help me .


Thanks in advance.

Assad