I beat ep1 at least 3 times from start to finish. but would like to play it again and don't want to go through the the first 2 chapters. How can I unlock the other chapters?
because I've had to reinstall the game since I reformatted my HDD. those other chapters are not active till I beat the previous ones. and I don't feel like going through the fist 2 chapters 'undue alarm' and 'low life'. just feel like more of a chore to play right now.
You can unlock all the chapters though the Console, to do this;
First go into options, click on the "Keyboard" tab, then click advanced, and check the box "Enable Developer Console" and then go into the console by pressing "`" it's the key above the tab
and type in sv_unlockedchapters 5