Once you defeat Ternion you'll try to load the game and your save slot will say "Empty", don't worry Master of Games is playing with your emotions, your game, and the Teen Titans. The next part throws you into a tournament of heroes composed of one classic arcade game, another that resembles Space Invaders, and in the third you have to defeat a powerful character Slade and his minions.
The first game is an updated version of the classic arcade game Pong in which you need to keep the ball in play by deflecting it back toward the wall on the opposite side. Score three points to progress to the next match.
The second challenge throws Starfire headfirst into a version of Space Invaders, just use her range attack to eliminate all of the enemy. Use the barrels for cover; one hit from an invader will bring your life to an end. You must eliminate all of the Space Invaders before being killed three times to progress to the next game.
The final challenge to the Teen Titans is Slade, who has a flame attack that packs enough power to seriously damage the Teen Titans, so keep an eye on Slade, when you see fire begin to glow around him, back off and give him some room to avoid his blast. A few times during the fight Slade will backoff and let his henchmen take a turn, the second time he does this, watch out for the nasty swinging axe traps.
Just eliminate all of the lesser villains and keep the pressure on Slade to drain his health to zero. Once he's down to zero, the Teen Titans will once again be told to stand on their spots to combine powers and finish Slade.