If you can, it would be best to allow everything under the construct.net and scirra.com domains, i.e.:
*.construct.net
*.scirra.com
Otherwise if you must provide every specific subdomain, then this list should do it:
www.construct.net
editor.construct.net
preview.construct.net
downloads.construct.net
account.construct.net
accountbeta.construct.net
stats.construct.net
build.construct.net
multiplayer.construct.net
signalling.construct.net
downloads.scirra.com
multiplayer.scirra.com