Glibc 2.15 not found?

[Stephen <skaldicpoet9@gmail.com>]

I'm trying to run the game VVVVVV on my system but whenever I try and 
launch it I get the following error: "./x86/vvvvvv.x86: 
/lib/i386-linux-gnu/i686/cmov/libc.so.6: version `GLIBC_2.15' not found 
(required by ./x86/libSDL2-2.0.so.0)"

I tried looking for glibc 2.15 in the software repository but could find 
no such package. How do I satisfy this dependency then?

-many thanks, Stephen