Since these are pretty unrelated, 3 Threads could be better:
a) linux-program to create flash
b) Swift 3d for linux
c) how to play half-life on linux

a) no idea
b) what is swift3d? a 3d-modelling software?
Blender is free on linux. But 'Swift3d linux' is a good google-phrase.
c) Wine is a win-emulator.