First I will state that in my opinion this is a professionally made game even though it is more or less a short version of the original; a standalone defense/swarm game with reused material from what I've seen. I can't give more than about three stars, this is by no means to imply that this is a bad game, it is simply because this is not a "new game" rather it's a standalone based upon the original but focusing on the swarm mode, though there are some differences from the original such as different music and splash screen.
It still bothers me with the noise when the aliens discover the player character and when they hole up in their spawn points and become dozens or so the sound becomes intolerable when they notice the player and the sound drowns speakers with annoying screaming. I suggest that this sound should be only used occasionally. Replace their screams with a background swarm noise instead, as a player I already know they're swarming in endlessly from their spawn points, I don't really need to hear their notice-screams every time ten or more of them sees me and start running towards my player character while enduring the sudden mega outburst of twenty separate scream clips runs through my speaker while blasting away. Sound is a component used to enhance the experience of a game and if I have to mute the game it immediately lowers the sense of immersion and becomes less fun to play. On the other hand the other sound effects are likable and well made.
I like the new menu screen's music track, repetitive but fulfills its purpose well as a mood track!
Nothing to criticize about, decently made.
The animated background picture in the menu is pretty awesome, the menu graphical representation is also well made as well as the in game graphics, the game's different interfaces really feels smooth and the game feels professionally made in this aspect. The aliens still don't have any attack animations though.
The new feature
I like idea of having a wingman at your side while battling the endless swarms of aliens,
despite being a small help he has some flaws. For one he got stuck several times in a wall edge and it took some time before he could walk around again. Sometimes he's straight up in the way as I can't fire my weapons through him, it is especially annoying in small passages and he becomes alien fodder before I can properly take down the swarms of aliens. And above all,
I'm not satisfied with that he keeps using the same rifle as I would prefer that the wingman actually changed weapons from time to time, especially at round two where he's more or less a sacrificial decoy because he's inadequate to defend himself, perhaps he could switch to the pulse rifle?
Noted glitches are minor details that doesn't seem game breaking but I'll list them here anyway.
1) The challenge "Bring it on" (Magazines collected) has a glitch with the progress-bar as it should be complete filled with the red color when completed but isn't, it looks simply untouched but the challenge displays otherwise that it is completed (level and progress maxed).
2) The rank is glitched in the sense that it displays the rank name 'null' when over rank 50 (I'm at rank 51 of 50 as of writing this review).
3) as stated earlier above, the wingman sometimes get stuck in wall edges.
4) The challenge "Where are you?" (kills without a laser sight) cannot progress unless I use the hand gun, which from the in-game graphics display has a yellow laser sight, and does not make any sense in relation to the challenge. Tried other weapons but only the hand gun can affect the progress of the said challenge.
Can't think of anything more really other than praise for your team's skills, both of the Outpost games you've published so far are really well made no doubt, and I really do look forward to the upcoming sequel to Outpost:Haven, the sneak peek pictures got my interest!