AffiliateA website that earns a commission by referring players to casino operators. Slot Footnotes is an affiliate site.Big Time Gaming (BTG)An Australian studio known for inventing the Megaways mechanic — a reel format where the number of ways to win changes on every spin. Blueprint Gaming licences the mechanic and uses it widely in UK-flavoured titles.Blueprint GamingA UK studio with a strong back catalogue of branded and original slots. Often found at mid-tier UK operators; known for progressive jackpots and licensed tie-ins with UK TV properties.Evolution GamingThe dominant live casino studio. Evolution supplies live dealer tables (roulette, blackjack, baccarat, game shows) to most major UK operators. Whether an operator carries Evolution is a useful proxy for live casino quality.Free spinsA promotional mechanic giving a set number of spins on a specified slot game. Winnings are credited as bonus funds or real cash depending on the attached terms. Always check the wagering requirement before using free spins.Game studioA company that designs and builds casino games (slots, live tables, table games) and licences them to operators. The operator does not own the games — they licence them. Examples: Pragmatic Play, NetEnt, Evolution.GamStopA free UK self-exclusion service. Register once to block yourself from all UKGC-licensed gambling sites simultaneously. Exclusion periods: 6 months, 1 year or 5 years. Available at gamstop.co.uk.House edgeThe mathematical advantage the casino holds on every game. On slots, the equivalent concept is expressed through RTP. The house edge ensures the operator profits on average over millions of plays, regardless of individual results.Live casinoCasino games streamed from a dedicated studio with real dealers. Roulette, blackjack and baccarat are the most common; operators using Evolution may also offer game shows and niche variants. The live experience is closer to a physical casino than a software-generated game.MegawaysA reel mechanic invented by Big Time Gaming (BTG) where the number of symbols on each reel changes randomly on every spin, producing a variable number of ways to win — sometimes up to 117,649. Licensed to many other studios.MicrogamingOne of the original and largest game studios, founded in 1994. Microgaming operates a large aggregator network supplying hundreds of studios' content under its umbrella. Known for large progressive jackpots including Mega Moolah.NetEntA Swedish studio (now part of Evolution Group) with a large catalogue of established titles — Starburst, Gonzo's Quest, Dead or Alive. Found at most major UK operators and widely regarded as a quality benchmark for slots.Pragmatic PlayA large multi-vertical studio producing slots, live casino and bingo content. One of the most widely distributed studios in the UK market; known for the Gates of Olympus series and other high-variance titles. Also operates Pragmatic Play Live.Red TigerA studio now owned by Evolution, known for daily jackpots and visually distinctive games. Red Tiger content is particularly common on operators with Evolution supply deals.Relax GamingA studio known for innovative mechanics and high-quality presentation. Produces its own titles and runs a content aggregation arm (Silver Bullet). Titles like Money Train and Money Cart have built a reputation for high-volatility, feature-heavy play.RTP (Return to Player)The theoretical percentage of total stakes a slot game pays back over millions of spins. A game with 96% RTP returns £96 for every £100 staked on average over a very large sample. Set by the studio, not the operator — the same game has the same RTP wherever you play it.UKGCThe UK Gambling Commission — the regulator for all commercial gambling in Great Britain. Operators must hold a UKGC licence to legally serve UK players. The UKGC enforces rules on fair play, player protection and responsible gambling.Wagering requirementThe number of times you must play through a bonus amount before it becomes withdrawable. A £10 bonus with a 35× wagering requirement means you must wager £350 before cashing out. The house edge on each bet means most players will not reach the target.Welcome offerA promotional offer for new players registering for the first time. Common formats include matched deposit bonuses (operator matches a percentage of your deposit) and free spins on a named slot. Terms — particularly wagering requirements — determine practical value.YggdrasilA Maltese studio known for premium visual production and distinct mechanics. Often found alongside NetEnt and Evolution at operators competing at the quality end of the market. Known for Vikings Go Berzerk and Joker Millions. 