8 levels, designed to be played solo (although not together). (These are 8 of the 19 in the Infinity version.) A bit linear at first... but good for a bit of carnage, if that's what you're looking for. No real plot on any of 'em.
10 levels, designed to be played solo (although not together). A bit linear at first... but good for a bit of carnage, if that's what you're looking for. No real plot on any of 'em.