How much do you think a download game should cost? A couple of developers are letting you put your money where your mouth is. Chronic Logic has just released version 1.6 of its indie platformer Gish and is letting players choose the price. Think the game is worth $1? $5? $50? Then that’s exactly what you pay. Radical Poesis is also experimenting with a pay what you can model with its tower defense game Immortal Defense (with a minimum of $1.75).