Understanding the Gem System
Pirots 4 features a seven-level gem upgrade system where each colour has progressively higher payouts. Birds collect only their matching colour, but feature symbols trigger upgrades that increase gem values by one, two, or three levels up to the maximum of level seven.
The Upgrade All feature symbol simultaneously boosts all four gem colours, creating substantial win potential when multiple high-level gems cluster together. During Super Bonus mode, every upgrade symbol automatically upgrades all colours, accelerating progression to maximum payouts.
Grid Expansion Mechanics
The game begins on a 6×6 metallic space station grid surrounded by four corner sections. Each corner houses a bomb that receives a random bird colour at the start of each round. When a bird of the matching colour collects a symbol at a bomb position, the bomb becomes primed.
Primed bombs detonate after birds complete their collection runs, removing all gems in a 3×3 area, destroying the adjacent space station section, and expanding the grid to its maximum 8×8 size. Destroyed sections transform into tunnels that birds can traverse, and corners open space portals for teleportation between opposite grid corners.
X-iter Buy Feature Options
Pirots 4 includes ELK Studios' X-iter system with five purchase options, all maintaining the base 94.0% RTP:
- Super Bonus (£500.00): Guaranteed entry to super bonus with maximum grid and all-colour upgrades
- Bonus Game (£100.00): Direct access to regular 5 free spins bonus round
- Lost in Space (£50.00): Immediate trigger of the Lost in Space collection game
- Alien Invasion (£25.00): One spin with guaranteed Alien Invasion; super bonus guaranteed if bonus activates
- Bonus Hunt (£3.00): Single spin with 4x increased chance of triggering bonus symbols
Costs scale proportionally with base stake. Minimum X-iter cost is £0.60; maximum is £50,000.00.
Space Duels During Alien Invasion
When the Space Bandit encounters a bird during Alien Invasion, a space duel determines the outcome. If the Bandit wins, the defeated bird is removed for the remainder of the feature, and the spaceship's multiplier increases before continuing column collection.
If a bird wins the duel, the entire Alien Invasion feature terminates immediately. The accumulated value collected by the Bandit receives the multiplier and pays out. Should the Bandit defeat all four birds, it collects all remaining symbols, applies the final multiplier, places random coins on the field, and returns the birds for a final collection round.
Why Pirots 4 Stands Out
This slot merges absurd thematic elements—space-faring pirate birds in a Wild West-inspired space station—with genuinely intricate mechanics. The four-bird collector system creates strategic depth as you track which colours are upgrading and where corner bombs will trigger grid expansion.
The 10,000x maximum win is achievable through stacked features: high-level gems across all four colours, multiplier-boosted coin symbols, and the Lost in Space bonus where all four birds' collections combine. Unlike simpler cascading slots, Pirots 4 demands understanding of bird movement patterns, feature symbol interactions, and grid expansion timing.
The 94.0% RTP sits below industry average, but the X-iter system allows players to access specific features directly rather than grinding base game spins. Super Bonus mode's forced all-colour upgrades significantly accelerates progression to level 7 gems, making the £500 buy-in potentially worthwhile for those chasing maximum payouts.
