Feature request title:
More project requirements for unlock
The projects are need more requirements before unlocking them, it is just too easy to unlock them.
Why it should be implemented:
When starting a new airport and start with small aircrafts. While waiting for the money to expand the airport I can do the research of the projects and mostly I finished up all projects before getting my first medium aircraft. For me it is just sad to have all unlocked but did not get the airport next to the new thing.
Same occurs for baggage handling. I can just wait the “moment” for finish up the scanners tier 3 before building my baggage system. It removes the feature of making improvements in the running airport or restructure things.
Just an idea can be:
- Finish up handling of xxxx baggage items in scanner tier 1 before unlock scanner tier 2 project
- Turnaround xxx small / medium aircrafts to unlock medium / large aircraft project
Most projects can get a previous requirement for unlock.
The number of requirements brings some more minor goals in the game instead of waiting for money and it can be lowered or increased based on the selected difficulty.