If you must handle unknown files, upload them to VirusTotal to check against dozens of antivirus engines simultaneously.
If you have already downloaded this file, look for these specific red flags before interacting with it: File: Tom.Clancys.Splinter.Cell.Chaos.Theory.zi...
A full copy of Chaos Theory should be several gigabytes. If the ZIP is only a few megabytes, it is almost certainly a downloader for malware . If you must handle unknown files, upload them