Final Fantasy VIII | Greenman Gaming | £8.99 (save £1.99)
Voucher Code: GMG20-CV2W4-DSYBT
Final Fantasy VIII is now available on PC as a new version with an optional magic booster (free, not a microtransaction) and a full version of Chocobo World. Though I personally felt that playing it was more like an Excel spreadsheet than an RPG (thanks, Drawing and Junction system), I'm definitely in the minority, since most players definitely enjoyed the storyline and characters. Greenman Gaming will save you nearly £2 with their GMG20-CV2W4-DSYBT voucher - be aware that you'll get a Steam code.
There are a couple of caveats, though. If you have a PS3 or Vita, you can buy the original game for £7.99 on PSN. Secondly, the soundtrack has been crunched into a nasty primitive MIDI format. Thirdly, it appears that you'll need a Square Enix account and... wait for it... a constant internet connection to play. Yay. Thanks to joobyplease @ HUKD!