Summon a random squad and hold the line for 100 waves. Every summon is a gamble — nine unit ranks, and the strongest ones are rare. Upgrade mid-run, break five boss waves, and spend what you earn on permanent upgrades. Let 80 enemies pile up on the field and it's over.
Climb a tower that collects worlds. Pick an unlikely hero, build around strange relics, and take on bosses with arenas as dangerous as their attacks. Brave seven very different trials, chase a better run, and climb solo or with up to three friends online.