i suppose you could try adding stuff to the game's desktop launcher.
like say -devmode or -console
so that in the property tabs you read for example
C:\Program Files (x86)\Fear2\fear2.exe
and then turn that into
C:\Program Files (x86)\Fear2\fear2.exe -console (or -devmode) perhaps that will allow you to get into the console and perhaps cheats can be entered in there.
please reply if that works
Those might work, but I doubt it since the other games didn't need them.
He could always try using the Tilde (~) key and seeing if that bring up a console or something. If that doesn't work I know that some games, like Doom 3 and Quake 4, use the Ctl+Alt+Tilde combo to open the console, so that's something else to try.
It could ALSO be that, in single-player mode, T just doesn't bring up any visible text box.
Also, you could either try editing the game files (donno which one since I haven't gotten my copy of the game yet) and binding ~ to the console or just rebinding the Talk function to another key (if you haven't already)