Swipe Siege
Swipe to angle a trebuchet and one-shot enemy keeps across endless arenas.
Swipe to set trebuchet angle and power, release to fire, watch the projectile arc across a side-on castle and trigger chain collapses.
Swipe up to set angle, swipe back to set power, release to fire.
Medieval siege dioramas with destructible brickwork.
Pulls the castle-smash viral loop out of Castle Busters and into a single-thumb reflex game playable on any commute.
Castle-smash is a proven hook (Castle Busters hit #8 top-free iPhone US, #14 top-grossing), but the two-step 'swipe-up for angle, swipe-back for power' gesture adds friction vs. Castle Busters' single-action control.Sensor Tower overview confirming Castle Busters' #8 top-free and #14 top-grossing US iPhone position validating the underlying hook. ↗
Side-on chain-collapse physics is highly visual and TikTok/Reels-friendly; Castle Busters already accrued 57K reviews in a short window showing the format travels, and the trebuchet-arc framing is more cinematic than Castle Busters' flat smash.Castle Busters' 4.66★ from 57K reviews demonstrates viral pull of the castle-smash format. ↗AppMagic identifies Castle Busters as one of Voodoo's 'Big Three' current hits, confirming category virality. ↗
Two-axis gesture (angle + power), physics-based trajectory prediction, and chain-collapse destruction states are non-trivial to prototype vs. a single-swipe hypercasual — adds meaningful dev scope.Crush the Castle: Siege Master shows the physics/collapse complexity this category historically requires. ↗
Voodoo's rewarded-video + interstitials on destruction games reliably monetize (Castle Busters is simultaneously top-free AND #14 top-grossing in US); revive-on-miss and double-reward ads map cleanly onto a one-shot trebuchet loop.Castle Busters ranking #14 top-grossing iPhone in US demonstrates strong ad monetization for this exact mechanic family. ↗AppMagic notes Voodoo actively expanding monetization tricks, suggesting current ceiling is high but evolving. ↗
The trebuchet/castle-smash niche is currently occupied by Castle Busters at peak chart position; legacy Crush the Castle plus 185+ trebuchet-tagged iOS apps indicate a populated category with the obvious leader still riding.Castle Busters currently at #41 top-free and #92 top-grossing globally — incumbent still active in the niche. ↗185+ trebuchet-tagged iOS apps show the broader subcategory is crowded, not whitespace. ↗