I don't know if the original game is also unplayable... maybe it's the download offered or just incompatibility with DOSBox. But essentially, progress in the game will be impossible about 60% in the game because of a bug (glitch? missing file?) that prevents two vital items from appearing.

The constant inaccuracies of Underdogs' reviews are making me wonder whether any of these games were even played or if stock information from other reviews are being used. Or perhaps they're carrying over their opinion of a different version/port of the game, which is a very bad move, espcially with all the differences.

Structurally, the game is identical to the NES version. However, this particular port is so broken that it's not funny. Half the gameplay changes may be just unintentional, caused by the glitches.

Among the many things that make this game messed up:
-All bosses can be killed with punches or hand gun.
-All your guns fire at an extremely high rate. Hell, the landmines are like ring-shaped bullets that fire out at high speeds.
-All the NES flaws are present, though in some places, they seem "fixed" (ie, screwed up in another way).
-There is no recovery time for your character and in the beginning of the game, 4 hits is all it takes for you to drop (sneak by unnoticed, or you'll lose all your health in literally one second).
-At least 3 doors don't open, 2 of which hold vital items.
-Surveillance cameras do not alert guards.

Some gameplay mechanics were modified:
-Laser sensors kill you immediately instead.
-The windy bridge is modified by some strange laser security system.
-The elevator sections are modified, though they look cool.
-No more passwords. Common to most DOS games, you have on-the-spot save and load option.

Please provide a fix for this game so that any gamer can properly play through and give a real opinion. Because at the moment, the game cannot be beaten.

I do have to note that the game is really fast and smooth (in fact, moreso than the NES version). So fast that you can get to the point of progress halt in at most 30 minutes (something that requires around 1 hour in all other versions).

UPDATE: Upon debugging to further progress in the game, it turns out that the game is indeed unbeatable. There is a room door that needs card 8, but it has card 8 INSIDE the room. Again, it's uncertain whether this is a problem with the game rip or the original yielded this flaw.

ADDENDUM: Upon further reflection, it's highly unlikely that the game's company would let THESE flaws pass. The final verdict is to avoid this download and please ignore the "review" provided by the site.