After completing 'Fastest Finger First', the contestant begins the main game, tackling a series of increasingly difficult questions. The questions are valued at progressively higher sums of money, up to the top prize of £1,000,000. The stacks of 15 questions were randomly chosen from a list of pre-generated questions based on general knowledge. For each question there were four options to choose from, labelled ‘A’, ‘B’, ‘C’ and ‘D’. During the game, contestants were allowed to use a set of three lifelines to help them with a question at any time, and two monetary safety nets were provided. If a contestant answered a question incorrectly, but had surpassed a designated safety net during their game, they left with that capped amount as their prize. If a contestant was unsure about a question they were facing, they were allowed to 'walk away', leaving the game with the cash amount they had already banked. While the initial questions were typically generally easy, the later and more challenging questions required the contestant to confirm that their answer is final, at which point their submission became locked in and could not be reversed. As a rule, the presenter Tarrant was not shown the correct answer on his monitor until a contestant had given their 'final answer'. If the episode had reached the end of its allotted time, an audio 'klaxon' was cued to highlight this; contestants who were still playing the main game would return in the next episode to complete their progress, though this was not the case for special editions of the show, such as celebrity episodes. During the live specials whilst Tarrant was host, the contestant's game ended and any question in play would be null and void unless they gave a final answer before the klaxon sounded.