It's an FPS game with simple mechanics and controls. My favourite part in this game is that players can play offline. Overall, it's an OK game, doesn't really stand out among all the FPS games out there. It's pretty simple as players are often armed with a main gun, a sidearm, a grenade, and a knife.
Graphics and gun variety aren't bad, and opponents, even if AI only in offline, can get a bit challenging. Making locked doors explode is also quite fun, as it's an important part of the game as well.
My biggest gripe here is that the concept of cover doesn't always work. I often find bullets going through thick walls, as I get damaged even when hiding behind something. This seems to be a bug, and I hope they fix this soon.
I am also not fond of the graphics. They can do better on this, even on mobile. But overall, not a bad game. Enjoyed it when a typhoon hit and there we had a power outage and no internet.