Not sure why this is in the games section because it's actually mental torture. The Disk contains horrible logic problems which leave you with the feeling you must be really thick.

Solving a problem takes time, patience and concentration, so be prepared. There's a knack to solving these - er, logic. You're given a series of clues and a grid where you use that logic business to work out the answers.

Sounds a bit on the dull side at first, but it slowly grips you as you grow increasingly frustrated. You know you should be able to complete it and it can turn into a battle royale as you swear you're not going to be beaten by a simple logic puzzle, damn it.