Steam Siege
XY series
- Released
- Cards
- 114+2 secret · 93 reverse holo
- Set code
STS
Steam Siege is a Pokémon TCG expansion from the XY series. It was released on August 3, 2016. Its set code is STS. The numbered set contains 114 cards. Including 2 secret rares brings the full card list to 116. Counting the finishes recorded in PoBinder gives 209 slots for a master checklist. Among cards with available market prices, the two highest-priced are Gardevoir EX at about $108.48 and M Gardevoir EX at about $57.62. Using available market prices, the base-set completion estimate is $288.12. The current estimate for a master set is $514.59. The median available card price is $0.28.
Market insightsSee what the set costs to complete and how its value has changed.~$288.12 base · ~$514.59 master~$288.12 base~$514.59 master
Steam Siege price statistics
- Most expensive card
Gardevoir EX#116 · $108.48- Cheapest card
Pawniard#63 · $0.09- Average card value
- $3.73
- Median card value
- $0.28
Prices from TCGplayer · updated today
Steam Siege price history
The historical TCGplayer market cost of completing the numbered base set.
Market-price estimate, methodology v1. Base selects the cheapest priced collectible finish for each non-secret card; Master sums each exact collectible finish. Marketplace listing lows are not used.
Steam Siege card list (116 cards)
Create a binder for Steam Siege and choose the printings you want to collect. Mark each card as you get it.
Most valuable cards in Steam Siege
- 1Gardevoir EXSecret Rare·#116/114$108.48
- 2
M Gardevoir EXUltra Rare·#112/114$57.62 - 3
Volcanion EXSecret Rare·#115/114$35.59 - 4
M Steelix EXUltra Rare·#109/114$29.05 - 5
Gardevoir EXUltra Rare·#111/114$26.80 - 6
M Gardevoir EXUltra Rare·#79/114$24.14 - 7
Steelix EXUltra Rare·#108/114$17.26 - 8
Professor SycamoreUltra Rare·#114/114$14.08 - 9
M Steelix EXUltra Rare·#68/114$11.05 - 10
Volcanion EXUltra Rare·#107/114$9.89
Steam Siege sealed product prices
Sealed products are priced separately and are not included in the set value.
Steam Siege Booster Box
$1,350.00
Steam Siege Sleeved Booster Pack Art Bundle [Set of 4]
$139.49
Mega Gyarados Collection Box
$644.46
Steam Siege Elite Trainer Box
$1,800.00
Steam Siege Booster Pack
$32.85
XY Steam Siege Sleeved Booster Pack
$39.45Prices from TCGplayer
FAQ about Steam Siege
How many cards are in Steam Siege?
Steam Siege has 114 cards in the base set and 116 cards in total once secret rares are included. 93 cards also exist as reverse holo variants, which is why a full master set is larger than the printed set number.
What is a Steam Siege master set?
A master checklist includes each card and its collectible finishes. PoBinder currently records 209 card-and-finish combinations for Steam Siege. Check the included finishes against the printings you want to collect. Available market prices give an estimate of $514.59 in singles, compared with about $288.12 for the base set alone.
What do Steam Siege sealed products cost?
Current market prices include Steam Siege Booster Box at about $1,350.00, Steam Siege Elite Trainer Box at about $1,800.00, Steam Siege Sleeved Booster Pack Art Bundle [Set of 4] at about $139.49 and Steam Siege Booster Pack at about $32.85. The latest price snapshot is dated October 16, 2026, and prices can change.
