It level is very good

Sure, it's kinda big, but sometimes, it's better to optimize your map properly.

One thing I wanna criticize is that the map is very badly optimized, it's kinda laggy for me.

@Snipe - In the basement canteen, with his back to you

So...Where is the main target?

I think the main performance issue is just the number of light sources and they cast numerous shadows, that eats cpu/gpu performance. so what you could do is to disable shadows almost all lights in 1 room and leave one of the lights to cast shadows.

来了来了，这张图超级大，超级用心，不愧是做了3个月的作品，先说bug，如果你从其他的门进入了需要按按钮开玻璃门的房间，在房间内靠近玻璃门时请估算门的开门轨迹，请不要站在角落（不然会被卡住，只能重开，不知道我描述清楚了没有）。图太大了，给路痴的人提供一下攻略。可以把这张图当探索类游戏游玩，不然直接开始打打杀杀，死的很快。现在一层找到mamtenance,找到房间号和红钥匙，在随便去一个房间号，就可以到达地下室了（当然也可以直接硬闯），我们的目标在canteen，非常好解决。地下室有一把黄钥匙（这个图的黄钥匙很多，多找找），然后来到2层拿到机密文件就OK了。蓝色钥匙在renovation入口的办公桌下面，好像没啥大用，就是杀个保安给武器。开头选entrance无所谓的，医院的地图是相同的，多找找，就行。