Introducing new Blue Coin upgrades!
Starting with the Cities patch Blue Coins now drop one per portal completed (stage 1000+) and from each boss defeated after stage 1m. The upgrades go to a maximum of 100 and their starting cost is 1 coin to give more available upgrades for early-mid levels.
The first 6 upgrades are available to you as soon as you can complete portals while the bottom 7 are only unlocked after reaching stage 1m.
Glam Metal - Increase artifacts gained from each drop by 1 per
Arcade Machine - Decrease damage taken by 0.8% per
Floppy Disks - Increase pet coin drop rate in rifts
Converters - Increase shield regen chance .3% per
Laser Sabers - Increase ammo regen chance .3% per
Contraption Inspectors - Decrease cost of HP/ATK upgrades after 1,000,000 by 1b per (minimum cost 1b)