GOG
Witcher 3 $32.99 AUD
Witcher 3 + Blood and Wine + Hearts of Stone $65.99 AUD
Witcher 2: $3.99 AUD
Witcher 1: $1.99 AUD
Witcher The Adventure Game: $1.79 AUD
Please note this is GOG game, with all game file and update provided from GOG website (can use GOG Galaxy to automate this) and dont have SteamCloud feature.
If you buy this CD PROJEKT RED will get 100% of the profit
Steam:
Witcher 3 $24.99 USD (~$34.31 AUD) http://store.steampowered.com/app/292030/?snr=1_7_15__13
Witcher 3 + Blood and Wine + Hearts of Stone $48.74 USD (~$66.89 AUD) http://store.steampowered.com/sub/68479/?snr=1_5_9__403
Witcher 3 + 2 + 1: $29.59 USD (~$40.61 AUD) http://store.steampowered.com/sub/68475/?snr=1_5_9__403
Witcher 2: $2.99 USD (~$4.11 AUD) http://store.steampowered.com/app/20920/
Witcher 1: $1.49 USD (~$2.05 AUD) http://store.steampowered.com/app/20900/
Witcher The Adventure Game: $1.49 USD (~$2.05 AUD) http://store.steampowered.com/app/303800/?snr=1_7_15__13
Please note
Steam has SteamCloud feature, all update and game file is provided from Steam
If you buy this CD PROJEKT RED will get 70% of the profit and Steam get 30% of the profit
UPDATE:
Humble Bundle also discounted the Witcher series to be same price as Steam
Steam sux. GOG.com all the way.