Tesla Jolt is one of those pre-x-mechanic Nolimit City builds that the studio basically stopped advertising once the xBomb and xWays era rolled in. No boosters on the splash, no horror dressing, just a 5×3 grid, 20 fixed lines and a single-tier 96.66% RTP. That last number is worth flagging because it sits noticeably above the 96.0% floor most NLC slots ship with.
The base round runs on one trick. Two different Wilds are used across the modes, and the version you see depends on whether you're spinning the main game or freespins. The base Wild is a blue electric block on a wooden stand that lands on reels 2, 3, 4 and 5 and substitutes for everything except the Tesla portrait Scatter. Then there's the Tesla Jolt symbol on reel 5. When it lands, the game picks one paying symbol set at random and converts every visible copy of it into a Wild for that spin. The Tesla Jolt symbol itself converts too. It doesn't fire often, but when it picks a low-value set sitting on three or four reels the boards stack up cleanly.
Tesla Spins is where the design earns its keep. Three, four or five Nikola Tesla Scatters award 10, 15 or 20 freespins. Wilds during the bonus use a different purple charged design and only land on reels 2, 3 and 4. They don't pay. Instead each one collects on a charge meter under its reel, and once a reel hits three charges the stored Wilds discharge and slam back onto that reel for the next spin. A Time-Lapse Trigger symbol on reel 5 short-circuits the wait: it discharges every collected Wild on every reel at once, awards 1 to 3 more spins, then turns itself Wild on the same spin. On the final spin every reel discharges regardless, and the Trigger always awards the full +3.
Honest gripe: the €2.00 minimum bet is steep for a 2019 release that doesn't market a max win figure, and the Charged Wilds variance can feel flat when meters refuse to fill before the spin counter runs out.