Hilariously poor voice acting. Meanwhile the EDF (despite using a Counter-Terrorist model from Counter-Strike: Source) are voiced by "Daniel UK" text-to-speech.
Disturbing character models, as Duki Nuki himself is a hideously deformed Duke Nukem model from the original 2011 game.
Abysmal graphics even by Unity 3D standards.
Dumb concept, which has nothing to do with Duke Nukem at all.
Extremely limited enemy variety, as you fight nothing but stereotypical green aliens. As for the other enemies, they can be only found during the boss fight against "Alien A".
The main antagonist, "Alien A" is literally a static Incredible Hulk model with a alien head slapped in it and does nothing but spawn enemies.
It's extremely short-you can beat it in 30-45 minutes without dying once. Also, there's only five levels and they're rather long due to Duki Nuki's slow movement speed.
Nearly non-existent arsenal, as you can only use your fists, the IMI Desert Eagle, the Benelli M3 and the Izhmash AK-47. Not to mention that the models are technically low-poly "worldmodels" stolen from Counter-Strike Source.
To make things worse, the bullets are projectiles that simply fall into the ground in a very short range and you can actually end up killing yourself by touching your own bullets!
Barebones AI, thankfully your allies are strong enough to defeat the aliens.
Very clunky controls, not to mention that you can instantly fly into the air by holding the Space bar, which also makes fighting aliens a cakewalk as long your weapons won't let you down.
Laughable, senseless ending where Duki Nuki becomes the president of Brazil.
Decent soundtrack, despite being stolen from games like Half-Life, Saints Row IV and Counter-Strike: Condition Zero - Deleted Scenes.
At least it runs in every computer, as confirmed by the trailer itself. Also, it's downloadable for free.