Hey!
Can you delete old savegames?
Bangow
You can overwrite them.
Unsure about deletion.
How do you overwrite them?
When you start a new game, you are asked which slot to use. Simply select an old slot to overwrite.
Probably a stupid question but will there be a way to delete them?
C:\Users%username%\AppData\Local\Game Dev Tycoon
You can delete your save games manually. Their location depends on your OS.
On Mac:
~/Library/Application Support/{app}/Local Storage
On Linux
~/.config/Game Dev Tycoon
(might be slightly different)
On Windows 8 Store Version
C:\Users{User}\AppData\Local\Packages\B3B9BB81.56264F78B4FFF_swksbykwsp6kr\RoamingState
On Windows 8 and Under:
Send us the file _file__0.localstorage contained in the Local Storage folder.
C:/Users/YOURUSER/Appdata/Local/Game Dev Tycoon/Local Storage/
where YOURUSER is your Windows user name.
To View the App Data folder please allow viewing of Hidden Files and Folder;
http://windows.microsoft.com/en-gb/windows7/show-hidden-files