Some games can be region locked at payment (ie. use VPN), others locked on Steam.
To check if the game is locked on Steam you can use SteamLocks
Sales list with $ prices: https://docs.google.com/spreadsheets/d/124jujdbayA-ACgUM5Fxt…
Some examples include:
- Middle-earth: Shadow of Mordor GOTY for USD 6.94
- Wasteland 2: Director's Cut for USD 7.71
- Feel free to point out any others in the comments!
(Personally, I used Tunnelbear which is a free chrome extension for VPN, and purchased Shadow of Mordor which activated fine on Steam)
Credit to /r/GameDeals
Got Witcher 3 for US$15.99 with PayPal using TunnelBear.