Stars are also required to tackle Infinity mode as well, which is essentially a ridiculously awesome endless survival mode that you can bring up to three friends into. (shortpause.com)
In the single - player mode, in addition to the tons of missions available, you can also play an endless survival mode where, true to the name, endless waves of enemies come at you in increasing numbers; and a skirmish mode, where you face off against a computer opponent in a straight - up battle to the finish. (toucharcade.com)
In addition to the campaigns are a few challenge modes that include a daily quest, a 30 stage survival mode, an endless survival mode, and finally an endless run mode whenever you manage to complete the quest campaigns. (videochums.com)