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OPERA1Tool for watching generated result files which you can use for play operation review of any TOP1 mission from any player. OPERA1 is availible to download in form of "open" mission (not in PBO), so it can be used for all islands. Result itself OPERA 1 is a tool for Gaia's VBS missions; TOP 1. OPERA 1 lets you watch any TOP 1 mission you have played where it gives you an overview of the battle with statistics, a nice addition by Gaia for Tactical Operation 1.