DC Universe activation prevents trade-in

Don't get any bright ideas about trading in DC Universe Online for a newer game - you can't.

It's an MMO; it's not allowed.

"Once the PSN key has been consumed with a disk it cannot be resold / replayed with the second user adding a sub. Only the original consumer can use that account. Disk and account are one," a Sony rep told QuickJump.

PC gamers are familiar with this approach, but for console gamers it's a step beyond Online Pass, i.e. buy the game second-hand and pay around $10 to unlock multiplayer.

Sony Online Entertainment, maker of DC Universe Online, doesn't offer spare paid-for activation codes. The code supplied with the disc is all there is.

Eurogamer gave DC Universe Online 6/10.