Albion have launched a special nine-match ticket for the remaining home games following this Saturday's sell-out against Barnet.
The package starts with the visit of promotion rivals Cardiff on February 10 and includes the fixture still to be re-arranged against Lincoln.
A number of fans have already exchanged their Withdean tickets for other matches after the postponement of the Lincoln game on January 6 and the switching of the LDV Vans Trophy tie against Brentford three days later.
Chief executive Martin Perry said: "It now seems fair to make all remaining Withdean tickets available to all supporters.
"We are sure there will be a strong demand to guarantee a regular place as the excitement mounts between now and the end of the season."
Prices range from £73 for concessions and the family area to £135 for adults in the east wing of the North Stand, with savings of between £3.50 and £8.50.
Applications must be made in person or via post to the ticket office in Queens Road, Brighton, and not by telephone.
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