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The game, described by MCV as "one of the more anticipated PSP titles of recent times", was released on Wii in March.
A THQ spokesman told IGN: "Basically, the PSP version was cancelled because of control issues.
"Big Willy Unleashed was designed by a Wii developer specifically for the Wii. When it was ported over to the PSP, the controls simply didn't translate well, and instead of pushing out the product with translated controls, it was cancelled."
Control issues on the Wii version of the game have also brought criticism, with Eurogamer commenting: "The controls make playing the game feel like trying to do the washing-up with a pair of chopsticks, using clogs instead of rubber gloves."
