What mistakes did the marines make in the film Aliens?

Finally, while not a Marine, Ripley makes what I would say was one of the biggest tactical mistakes. When kitting herself out prior to storming the Queen's lair to rescue Newt, she grabs a Pulse Rifle, a flame unit, flares, a motion tracker, and a bandoleer of 30mm grenades. But she only brings one magazine for the rifle. read more

Thankfully there was a transmitter on site and Bishop could do those things he did. read more

The numerous mistakes and plot holes in Alien: Colonial Marines, especially with regards to continuity with the films that preceded it, were much criticized upon the game's release, especially given Gearbox Software's repeated assurances during development that the game would honor and fit into the continuity of the film series. read more

There are two implications from this line: 1. The colonial marines have encountered alien life forms before but nothing like the titular aliens. 2. They have been on various missions like this but as of yet have encountered nothing dangerous. read more