XY
Steam Siege (STS) Card List
Steam Siege is a XY set released on August 3, 2016. Its main set runs to 114, and 2 secret rares are numbered past it, for 116 cards in all.
The rarest pulls are its 2 Rare Secrets and 8 Rare Ultras.
Its most valuable cards right now are Gardevoir-EX 116/114 at $108.48, M Gardevoir-EX 112/114 at $57.62 and Volcanion-EX 115/114 at $35.59 (Near Mint market prices as of October 17, 2026).
Its cards were illustrated by 52 artists; 5ban Graphics drew the most, with 18 cards.
Holofile also lists 23 sealed products from the set, including blisters, battle decks and booster packs.
- Set codeSTS
- Main set114
- Secret rares2
- ReleasedAug 3, 2016
Chase cards
The 8 most valuable cards in Steam Siege, by Near Mint market price.
All 116 cards
Tangela$0.25−17%
Tangrowth$0.170%
Hoppip$0.21−5%
Skiploom$0.210%
Jumpluff$0.390%
Yanma$0.17+13%
Yanmega$0.20+5%
Yanmega BREAK$2.94+4%
Seedot$0.18+20%
Nuzleaf$0.14+8%
Shiftry$0.71+15%
Foongus$0.47+21%
Amoonguss$0.28+4%
Larvesta$0.28−7%
Volcarona$0.78+4%
Ponyta$0.18−10%
Rapidash$0.28+27%
Chimchar$0.20−13%
Monferno$0.23−12%
Infernape$1.16−22%
Talonflame BREAK$4.93+8%
Litleo$0.15+25%
Pyroar$0.28+12%
Pyroar BREAK$3.43−20%
Volcanion$0.32−6%
Volcanion-EX$2.830%
Mantine$0.21−12%
Shellos$0.25+25%
Gastrodon$0.600%
Oshawott$0.25−7%
Dewott$0.19+12%
Samurott$0.40−9%
Clauncher$0.12−8%
Clawitzer$0.31+7%
Clawitzer BREAK$3.43−1%
Bergmite$0.170%
Avalugg$0.53+20%
Mareep$0.27+4%
Flaaffy$0.25−14%
Ampharos$0.87+2%
Joltik$0.26+13%
Galvantula$0.46+5%
Nidoran ♂$0.24−20%
Nidorino$0.22−19%
Nidoking$0.77−7%
Drifloon$0.24+4%
Drifblim$0.26+30%
Litwick$0.17−15%
Lampent$0.23+15%
Chandelure$2.39+19%
Hoopa$0.53+15%
Mankey$0.22−4%
Primeape$0.34+3%
Nosepass$0.15−6%
Probopass$0.270%
Anorith$0.18−10%
Armaldo$0.40−13%
Croagunk$0.15+15%
Toxicroak$0.27+8%
Sneasel$0.21+17%
Weavile$0.40+5%
Spiritomb$0.30−3%
Pawniard$0.09−10%
Bisharp$1.26+11%
Yveltal$0.62−2%
Yveltal BREAK$6.86−18%
Steelix-EX$3.02+7%
M Steelix-EX$11.30+5%
Shieldon$0.250%
Bastiodon$0.51+9%
Klink$0.15−21%
Klang$0.16+7%
Klinklang$0.34−8%
Cobalion$0.36−8%
Magearna-EX$1.57+8%
Marill$0.38−16%
Azumarill$1.73+2%
Gardevoir-EX$5.82+17%
M Gardevoir-EX$24.09+5%
Klefki$0.28−12%
Xerneas$0.91+8%
Xerneas BREAK$7.63+3%
Druddigon$0.30−3%
Deino$0.15+7%
Zweilous$0.24+33%
Hydreigon$0.43−7%
Hydreigon BREAK$6.01+4%
Meowth$0.32+10%
Persian$0.26+13%
Aipom$0.24+14%
Ambipom$0.18−10%
Rufflet$0.15−21%
Braviary$0.16−6%
Fletchling$0.16−6%
Fletchinder$0.14−12%
Talonflame$0.390%
Hawlucha$0.22+5%
Armor Fossil Shieldon$0.22−4%
Captivating Poké Puff$0.210%
Claw Fossil Anorith$0.25+9%
Gardevoir Spirit Link$0.24+9%
Greedy Dice$0.150%
Ninja Boy$0.140%
Pokémon Ranger$0.14−22%
Special Charge$0.35−3%
Steelix Spirit Link$0.22−12%
Volcanion-EX$9.89−4%
Steelix-EX$17.37−6%
M Steelix-EX$29.05−4%
Magearna-EX$9.04−3%
Gardevoir-EX$26.80+4%
M Gardevoir-EX$57.62−1%
Pokémon Ranger$7.05−6%
Professor Sycamore$14.13+12%
Volcanion-EX$35.59−6%
Gardevoir-EX$108.48+1%
Market prices as of October 17, 2026: Near Mint, in US dollars. Prices are estimates from third-party market data and are not offers to buy or sell.
Steam Siege sealed products
Steam Siege Booster Pack$32.51+5%
Steam Siege Booster Box$1,350.00+7%
Steam Siege Sleeved Booster Pack$39.45+9%
Steam Siege Single Pack Blister - Lucario$64.06+1%
Steam Siege Elite Trainer Box$1,800.000%
Steam Siege Single Pack Blister - Floette$37.29+1%
Steam Siege Mega Gyarados Collection Box$644.460%
Steam Siege Battle Arena Decks: Keldeo EX vs Rayquaza EX$192.61+15%
Steam Siege Battle Heart Tin - Pikachu EX$217.49−3%
Steam Siege Sleeved Booster Pack Art Bundle (Set of 4)$139.49−2%
Steam Siege Battle Heart Tin - Magearna EX$206.240%
Steam Siege 3-Pack Blister - Rayquaza$300.000%
Steam Siege Prerelease Kit$160.320%
Steam Siege Battle Heart Tin - Volcanion EX$229.99+5%
Legendary Battle Decks - Articuno$103.960%
Steam Siege 3-Pack Blister - Azelf
Steam Siege Theme Deck - "Ring of Lightning"$22.910%
Steam Siege Legendary Battle Decks - Moltres$94.950%
Steam Siege Legendary Battle Decks - Zapdos$81.98+14%
Steam Siege Collectible Pin 3-Pack Blister - Shiny Mega Gardevoir
Steam Siege Collectible Pin 3-Pack Blister - Volcanion
Steam Siege Theme Deck - "Gears of Fire"$20.06+3%
Steam Siege Legendary Battle Decks (Set of 3)
Market prices as of October 17, 2026: unopened, in US dollars. Prices are estimates from third-party market data and are not offers to buy or sell.
Steam Siege FAQ
How many cards are in Steam Siege?
Steam Siege has 116 cards: 114 in the main set, numbered to 114, and 2 secret rares numbered past 114.
When was Steam Siege released?
Steam Siege was released on August 3, 2016, as part of the XY series.
What is the most valuable card in Steam Siege?
Gardevoir-EX (116/114), with a market price of $108.48 for a Near Mint copy as of October 17, 2026.
What are the rarest cards in Steam Siege?
Its top rarity is Rare Secret, with 2 cards: Volcanion-EX and Gardevoir-EX.
What is the set code for Steam Siege?
The set code for Steam Siege is STS.