very probably yes. it is very , very likely malware.
it has all the red flags. like password protected rar.
there is this thread about psa with discord and try my game. all the games lately have the tank theme as well.
(the password protection is only there to prevent automatic scanning. absolutely NO legit dev will host a password protected archive on itch directly. there is absolutely no reason for this. not with the passwort written in the description or given in discord to "try" a game. you might have early access and beta testers and such, but this is done with unlisted games or game download keys and not with protected archives.)