You are playing Portal Panic

Description:
Undergo each level in Portal Stress gunning lower each and everything you discover. Be cautious though as they'll be armed and they'll come once you with anything they have! Make sure to change your hero’s so that you can remove your opponents as rapidly as you possibly can, once you discover a checkpoint as you can also swap your hero’s for others that you've.

Age Rating:13+

How to play:
Make use of the mouse and also the keyboard for those controls in game.