Is this game open world?

[Assassdolan]

Title.
Also,are the other 2 in the trilogy open world?

[wowegoo]

No, classic story driven.

[Standie]

Not really, but there are some hub locations where you can explore, talk to people and buy items. Actual missions take place in unique environments that can't be accessed during other moments of the game.

[X-Vector]

Mass Effect 1 is the least non-open world game of the three.

Unfortunately, due to criticism of the cut-and-paste nature of planetary exploration, Bioware threw the baby out with the bathwater and eliminated that feature completely.
Even in the storyline missions there is a lot less freedom to explore, with more emphasis on cutscene spectacle and teleportation to and from otherwise inaccessible and invisible environments (as mentioned above).
Also, player and squadmate character talent upgrading and customisation is severely diminished, with a corresponding lack of available loot and purchases.
Naturally this affects the combat system, which is "streamlined" by doing away mostly with player choice concerning equipment and ammunition types.

The upshot is that ME2's world (and apparently that of ME3 as well) feels like a fractured experience that compromises Mass Effect's impact as a connected, wide-ranging adventure in a persistent universe.
It's still a quality game that's worth playing, but it could have been so much more if Bioware had only decided to improve on the faults of the original and had focused on adding rather than substracting.

In the end though, sales figures have been on the incline, so I highly doubt that Andromeda will buck the trend of funnelling the player through the rollercoaster ride.