The full version of Opera browser is available for free from Opera.com. Opera is available for Windows, Mac OS X, Linux, Android and iOS. Opera Software has no trial versions of its flagship browser available for download.
Any version of Opera browser labeled as a free trial has not been released by Opera Software and is not the software it claims to be. When a party on the Internet pretends to be someone else to trick users into downloading software or giving up personal information, it's called phishing. Fraudulent software, known as malware, can steal credit card information or damage the computer on which it's installed.