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
About this release
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 £578. 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.
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 →Most Valuable XY - Steam Siege Cards
The most valuable card in XY - Steam Siege is Gardevoir EX at around £100.
Chase-card prices powered by PulseTCG · updated 22 September 2026
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.
XY - Steam Siege Rarities
XY - Steam Siege has 116 of 116 cards currently revealed.
Rarity
- Common31
- Uncommon30
- Rare23
- Ultra Rare14
- Holo Rare9
- Rare BREAK7
- Secret Rare2
XY - Steam Siege Booster Boxes & Products
XY - Steam Siege has 5 sealed products across booster packs & boxes, decks, collection boxes, more from this release. The Booster Box includes 36 booster packs, 10 cards per pack.
Booster Packs & Boxes
Decks
Theme Deck
- 60-card ready-to-play deck featuring Fire and Metal types, damage counters, coin, rulebook
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
When was XY - Steam Siege released?
XY - Steam Siege was released on 3 August 2016.
How many cards are in the XY - Steam Siege Booster Box Booster Box?
A XY - Steam Siege Booster Box Booster Box contains 36 packs of 10 cards each, 360 cards in total.
How many cards are in XY - Steam Siege?
XY - Steam Siege contains 116 cards. 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?
The base XY - Steam Siege set has 116 numbered cards. A full master set — one of every card including reverse-holo and secret-rare printings — comes to 207 cards.
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 £100. Prices reflect market data as of 22 September 2026.
How much is a complete XY - Steam Siege set worth?
A complete set of all 116 cards is worth around £578 at current market prices. Card values range from under £1 for commons up to £100 for the top chase card. Prices reflect market data as of 22 September 2026.
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.
Is XY - Steam Siege worth buying?
XY - Steam Siege has 10 cards currently worth £10 or more, led by Gardevoir EX 116/114 at around £100. Its combination of high-value chase cards and playable cards gives it appeal to collectors and deck-builders, though sealed-product value depends on purchase price and pull results.
How do you price your cards?
The card prices shown on this page are current UK market values, sourced from PokePulse - a dedicated Pokemon TCG price tracker. We refresh them regularly, so you see an up-to-date UK valuation rather than a US price simply converted to pounds.
Which high-rarity cards are in XY - Steam Siege?
XY - Steam Siege's premium cards are its Rare BREAKs, Ultra Rares and Secret Rares — the set's highest-rarity treatments — 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.
How many XY - Steam Siege cards are worth over £20?
6 cards in XY - Steam Siege are currently worth £20 or more, led by Gardevoir EX 116/114 at £100. The rest are more affordable commons, uncommons and lower rares.
What are the best cards to pull from XY - Steam Siege?
The most sought-after pulls are Gardevoir EX 116/114 (£100), M Gardevoir EX 112/114 (£54.51), Volcanion EX 115/114 (£35.24), M Steelix EX 109/114 (£28.19), Steelix EX 108/114 (£17.25). These high-rarity cards carry most of the set's value.
Where can I find the official Pokemon TCG rules?
The full rules and how-to-play guide are published on the official Pokemon TCG website.
Where can I buy XY - Steam Siege singles?
Individual XY - Steam Siege singles are available to buy at Monster Card Corner.
