I think its CS 1.6.
The weapons sure look like 1.6 but the graphics are much worse. Like it was all compressed and limited to 800x600.
Too much for compressing just for the flexibility of the game.
Unfortunately, my download doesn't goes through because it was detected as a virus so basically a failed one. Even I turned off my AV, weird still it was tagged as virus. It's a hassle if I will uninstall my AV and turned off my Windows Defender. I will try another way to download it.
I'm planning to download it but I'm discouraged now.