Trolldor said:
Hardly Mass Effect at all.
The conversation system is 'similar', but the gameplay is not.
If you don't stealth or make use of gadgets and weapon modifications, then the only way to play is on the easiest difficulty setting. Even then you can die if you're careless and Rambo it like you can in Mass Effect.
It's a stealth-action RPG. The turning invisible part comes with the RPG part.
That is my point, it is a stealth action RPG and the stealth part falls directly under the RPG part in this game, making it nothing like splinter cell at all.
I would still say that the best game to compare it to is Mass Effect, since for me the conversations and RPG stuff outside of the combat was the main part of Mass Effect, and the bit i enjoyed the most. It is this part that i think is extremely similar to Alpha Protocol.
In terms of the action parts, it can be the same as ME, or it can be extremely different, but the structure is the same. At the most basic level they are both just almost-identical shooters, but what makes them different is the powers and abilities you get in both games. They both give the player completely different powers and abilities that allow you to play both in extremely different ways if you want to, for example the stealth powers you can get in AP but not in ME, or the biotic powers you can get in ME but have nothing similar in AP. This leads to different choices of play-styles in both games. Even so, i still think that ME is the best thing to compare it to.