Here is the full list of all 10 Ekstase achievements.
Finish a game of Beat99 without ever missing a beat.
Start a three-color challenge mode with speed level 0 and reach level 10.
Start a two-color challenge mode with speed level 0 and reach level 10.
Reach level 10 in flowmode without ever going down a speed level
Play a flow mode game for more than 30 minutes.
Beat all time attack challenges in mode A.
Beat all time attack challenges in mode B.
Reach the top in any of the leaderboards.