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XY - Steam Siege
116-card expansion featuring Gardevoir EX, Volcanion EX and M Gardevoir EX.
- Game
- Pokemon TCG
- Publisher
- TPC
- Release date
- 3 August 2016
- Cards
- 116
- Status
- Released
What is XY - Steam Siege?
XY - Steam Siege is a Pokemon TCG expansion in the XY series, released on 3 August 2016. The set contains 116 cards, including Gardevoir EX, Volcanion EX and M Gardevoir EX, alongside Rare BREAKs, Ultra Rares and Secret Rares sought after by both players and collectors.
At current market prices, the complete set is worth around £583. Gardevoir EX leads the value charts, while sealed booster boxes, Elite Trainer Boxes and individual singles offer multiple ways to collect or build competitive decks.
When did XY - Steam Siege come out?
- 2 May 2016XY - Fates CollidePrevious release
- 3 August 2016XY - Steam SiegeReleased
- 2 November 2016XY - EvolutionsNext release
- 3 February 2017SM Base SetUpcoming
- 5 May 2017SM - Guardians RisingUpcoming
New to the game?
What is Pokemon TCG?
The Pokemon Trading Card Game is a two-player game where each player builds a 60-card deck around a team of Pokemon and battles to knock out the opponent's Pokemon. Every time you knock one out you take a Prize card - take all of your Prizes (usually six) to win.
How a game plays
Each turn you draw a card, then play Basic Pokemon, attach Energy, use Trainer cards and attack. Attacks need the right Energy attached; when a Pokemon's HP runs out it is knocked out and the attacker takes a Prize. Basic Pokemon evolve into stronger Stage 1 and Stage 2 forms as the game develops, so a deck is about building an engine of Pokemon, Energy and Trainers that work together.
Read the official how-to-play guide →What are the most valuable XY - Steam Siege cards?
The most valuable card in XY - Steam Siege is Gardevoir EX at around £50.00.
Chase-card prices from UK eBay listings and TCGPlayer · updated 10 November 2026 · current UK market values, not US prices converted to pounds
XY - Steam Siege Card List
Every XY - Steam Siege card is listed below with its number, rarity and current UK reference prices, searchable and filterable.
Full card list
Every card-number record in the set, searchable and filterable. Select any card for its full details.
What rarities are in XY - Steam Siege?
116 of 116 cards currently revealed for XY - Steam Siege.
Rarity
- Common31
- Uncommon30
- Rare23
- Ultra Rare14
- Holo Rare9
- Rare BREAK7
- Secret Rare2
What XY - Steam Siege booster boxes and products are there?
XY - Steam Siege has 5 sealed products across booster packs & boxes, decks, collection boxes and accessories. The Steam Siege Booster Box includes 36 booster packs, 10 cards per pack.
Booster Packs & Boxes
Decks
Gears of Fire Theme Deck
- 60-card ready-to-play deck featuring Fire and Metal types, damage counters, coin, rulebook
Ring of Lightning Theme Deck
- 60-card ready-to-play deck featuring Psychic and Lightning types, damage counters, coin, rulebook
Collection Boxes
More from this release
Contents as listed by the publisher. Prices and availability update automatically.
Competitive Play
Continue exploring
Official resources
Frequently Asked Questions
What is the most valuable card in XY - Steam Siege?
Gardevoir EX 116/114, the Secret Rare, is currently the most valuable card in XY - Steam Siege, worth around £50.00. Prices reflect market data as of 10 November 2026.
When was XY - Steam Siege released?
XY - Steam Siege was released on 3 August 2016.
How many cards are in XY - Steam Siege?
XY - Steam Siege contains 116 cards: 114 in the main set plus 2 secret cards numbered above 114. The main set includes 31 Commons, 30 Uncommons, 23 Rares, 9 Holo Rares, 7 Rare BREAKs, 14 Ultra Rares and 2 Secret Rares. The two Secret Rares are the rarest cards in the set.
How many cards are in the XY - Steam Siege master set?
Across the 116 XY - Steam Siege cards we list, a full master set — one of every printing, including reverse holo cards — comes to 207 cards.
How much is a complete XY - Steam Siege set worth?
A complete XY - Steam Siege set — one copy of each of its 116 cards in the cheapest printing — costs around £332 at current market prices. Single cards range from £0.99 to £50.00 for Gardevoir EX 116/114. Prices reflect market data as of 10 November 2026.
How much does the XY - Steam Siege master set cost?
At current market prices, completing the XY - Steam Siege master set — one of all 207 printings — costs approximately £448, led by Gardevoir EX 116/114, the Secret Rare, at £50.00. Prices reflect market data as of 10 November 2026.
What are the best cards to pull from XY - Steam Siege?
The most valuable cards to pull are Gardevoir EX 116/114: £50.00, M Gardevoir EX 112/114: £27.62, Volcanion EX 115/114: £26.64, M Steelix EX 109/114: £15.12, Azumarill 77/114 (reverse holo): £12.38. Each price is for the printing named. Prices reflect market data as of 10 November 2026.
Which high-rarity cards are in XY - Steam Siege?
The rarest cards in XY - Steam Siege are its Rare BREAKs, Ultra Rares and Secret Rares, including Gardevoir EX, Volcanion EX and M Gardevoir EX.
What rarities are in XY - Steam Siege?
XY - Steam Siege includes Common, Uncommon, Rare, Rare BREAK, Ultra Rare, Holo Rare and Secret Rare cards, from the most common to the rarest.
Is there a full card list for XY - Steam Siege?
Yes. This guide has the full 116-card booster checklist with card images, search and rarity filters.
How many XY - Steam Siege cards are worth over £20?
3 of the 116 cards in XY - Steam Siege are currently worth £20 or more, led by Gardevoir EX 116/114 at £50.00. Prices reflect market data as of 10 November 2026.
Where can I buy XY - Steam Siege singles?
Individual XY - Steam Siege singles are available to buy at Monster Card Corner.
What comes before and after XY - Steam Siege?
XY - Fates Collide came before it; XY - Evolutions follows it.
