been playing this all weekend and once you get the dungeons it gets alot easier since you get all the upgrade cards there for your weapons, managed to compelte this bad boy, one card is so easy that i was unaware i'd got it until i died. I was busy doing other things
well good
loads of replay value and you have to since some prisoners arnt accessable until you get specific dungeons cards (tutors love, ancient ruins etc) and obviously multiple routes
other nice cards are paper thin - you have to complete any level without getting hit
also all the bosses have cards and they have to give them to you which means you have to destroy them a specific way. there are loads of faqs on the net but just try and kill them as quickly as possible, but you wont be able to do this until you have loads of upgrade cards (+, extra ammo and tnt)
hidden extras - which can be found out using ir sensor or hidden parts of levels which offer prisoners or upgrades
different vehicles - upgrade cards change the slug into a type r (reverse), which is pretty useless, slug gunner which is hard to use but you get a mech slug or a tank and finally the best of the conversions, black hound which gives the slug a smilie face and instead of a rail gun you have a guided missle launcher ontop which is quite effective
the bad
difficult at the start which might turn people off at the start and funnily enough when you have upgrades it becomes pretty easy, i reckon i can destroy each boss (except the last) in around 5-8 seconds, the final mission boss in around 10 seconds
auto fire - kinda destoys any skill involved in the game, this game should be played with manual fire - the only way to appreciate this game