user@user-HP-Notebook:/$ ls -la
total 128
drwxr-xr-x 27 root root 4096 May 18 11:19 .
drwxr-xr-x 27 root root 4096 May 18 11:19 ..
drwxr-xr-x 2 root root 4096 May 17 21:21 bin
drwxr-xr-x 3 root root 4096 May 17 21:47 boot
drwxr-xr-x 2 root root 4096 Dec 17 22:18 cdrom
drwxr-xr-x 21 root root 4640 May 18 11:29 dev
drwxr-xr-x 170 root root 12288 May 18 11:01 etc
drwxr-xr-x 5 root root 4096 Feb 17 20:05 home
drwxr-xr-x 3 root root 4096 Jan 6 18:23 include
lrwxrwxrwx 1 root root 32 May 17 21:28 initrd.img -> boot/initrd.img-4.4.0-78-generic
lrwxrwxrwx 1 root root 32 May 11 02:05 initrd.img.old -> boot/initrd.img-4.4.0-77-generic
drwxr-xr-x 24 root root 4096 May 2 21:16 lib
drwxr-xr-x 2 root root 4096 Mar 22 20:01 lib32
drwxr-xr-x 2 root root 4096 May 2 21:16 lib64
drwxr-xr-x 2 root root 12288 Mar 22 20:01 libx32
drwx------ 2 root root 16384 Dec 17 22:15 lost+found
drwxr-xr-x 3 root root 4096 Dec 18 00:39 media
drwxr-xr-x 6 root root 4096 May 3 21:35 mnt
drwxr-xr-x 8 root root 4096 May 17 21:05 opt
dr-xr-xr-x 229 root root 0 May 18 11:29 proc
drwx------ 17 root root 4096 May 18 11:28 root
drwxr-xr-x 27 root root 860 May 18 11:34 run
drwxr-xr-x 2 root root 12288 May 17 21:21 sbin
drwxr-xr-x 2 root root 4096 Apr 19 2016 snap
drwxr-xr-x 2 root root 4096 Apr 21 2016 srv
dr-xr-xr-x 13 root root 0 May 18 13:24 sys
drwxrwxrwt 13 root root 4096 May 18 13:22 tmp
drwxr-xr-x 15 root root 4096 Jan 6 17:29 usr
drwxr-xr-x 15 root root 4096 Mar 17 20:19 var
lrwxrwxrwx 1 root root 29 May 17 21:28 vmlinuz -> boot/vmlinuz-4.4.0-78-generic
lrwxrwxrwx 1 root root 29 May 11 02:05 vmlinuz.old -> boot/vmlinuz-4.4.0-77-generic
Если хотите писать игры не мирового класса, то учите готовые движки, Unity или Unreal