New events & re-released events are all based on the region you are currently in when the event starts.
The only way to get cheaper tiles is to do Older Unsegmented Stories which you can purchase from the Shop for either 100 or 500 gems.
Some of the Older Unsegmented Stories give you back more than 100 gems on the 1st time play through.
If you don't already have it..... the Professor Switch System is a very good investment for 250 gems
Check it out here
Diggys Adventure is a progressive game....the further that you go into the game the more expensive, harder & challenging it becomes.
Game strategies, agendas & theories are an integral part of playing Diggys Adventure as it is a long term game that primarily hinges on the strength of your underground camp.
What region you are in is what governs the tile price
From what I personally understand the regional approximate differences are as follows:
Egypt to Scandinavia is an increase of x6
Scandinavia to China is an increase of x3
China to Atlantis is an increase of x2
Atlantis to Greece is an increase of x1.8
Greece to New World is an increase of x1.4
New World to Terra is an increase of x1.25
Its very important to make your underground camp strong.
You might want to check out these forum threads...there is a lot of good information & links that cover quite a few different topics in relation to game strategies, camp equipment, Professor Switch System, Grid Unlock, etc
Diggys Adventure is a long term game to which game strategies are an integral part of the game.
Lol jinx @Abhi 😂🤣