Neither a great game, nor a Rainbow Six game
Lockdown plays like a budget title. The AI is terrible. The action is quick and simple. The levels are linear. The story is something about a virus. Different weapons make no difference. Everything is painfully...plainfully plain.
This is also not a Rainbow Six game anymore. Gone are many of the important tactical features, which make a Rainbow game. Gone is the complexity, realism and mission planning. Orders can still be given to team members to breach doors, throw grenades, clear rooms and scout around corners, but that's about all that remains. Yes, the graphics are acceptable, but that does not help the fact that this is a bare-bones FPS instead of a tactical Rainbow Six game.
Thankfully, not that many people noticed that this game came out. Good.