And for pleasure, there was the simulator, the most perfect videogame he had ever played. Teachers and students trained him, step by step, in its use. At first, not knowing the awesome power of the game, he had played only at the tactical level, controlling a single fighter in continuous maneuvers to find and destroy an enemy. The computer-controlled enemy was devious and powerful, and whenever Ender tried a tactic he found the computer using it against him within minutes.