Sidescrolling shooter where you rescue Vietnam POWs
Solution 1:
Looks like Broforce or The Expendabros. The screenshot and description match perfectly.
Solution 2:
That's level two of Broforce.
Here is a random Youtuber playing that level:
Looks like Broforce or The Expendabros. The screenshot and description match perfectly.
That's level two of Broforce.
Here is a random Youtuber playing that level: