It (hopefully) won't be long before the release of this one, but if you missed the recent deal from GameFly you're in luck. GMG's latest offer works out slightly cheaper with the voucher code above, providing a save of around a fiver overall.
A bit of housekeeping before you jump on this though - word is that purchasing from GMG will not yield a Steam key, as it will use Telltale's version of DRM instead. Users on HUKD have suggested directly contacting Telltale for a Steam key, but that it isn't a guaranteed solution. Don't fret about losing your Season 1 progress though, as it will continue regardless of how you play. Thanks to oUkTuRkEyIII @ HUKD!