Hackxor is a webapp hacking game where players must locate and exploit vulnerabilities to progress through the story. Think WebGoat but with a plot and a focus on realism&difficulty. Contains XSS, CSRF, SQLi, ReDoS, DOR, command injection, etc
Features:
If you can't edit the hosts file for some reason, you could use the 'Override hostname resolution' option in Burp proxy
You play a professional blackhat hacker hired to track down another hacker by any means possible. Start by checking your email on wraithmail, and see how far down the rabbit hole you can get. The key websites in this game are http://wraithmail:8080 http://cloaknet:8080 http://gghb:8080 and http://hub71:8080 so if you don't feel like tracking down your target you may hack them in any order. Each website will be properly introduced through the plot.
Source: http://hackxor.sourceforge.net/cgi-bin/index.pl