Steam Siege№ 116
Gardevoir-EX
$109.26Details
Pokémon TCG expansion
Steam Siege card list
116 cards in the XY Series, led by Gardevoir-EX at $109.26.
Steam Siege (set code STS) contains 116 cards: 114 main-set cards and 2 secret rares. It is a Pokémon TCG expansion released in 2016 as part of the XY Series. Its top chase is Gardevoir-EX (Rare Secret) at $109.26 on the open market. The set features 2 Rare Secrets, with the average tracked card valued at $3.75.
■ Chase Rankings
Which cards lead the chase in Steam Siege?
■ About this set
What is Steam Siege?
Steam Siege is a Pokémon TCG expansion released in 2016 under set code STS, part of the XY Series. Chase Season lists 116 cards across 8 rarity tiers, from base commons through the rarest special illustration pulls. The rarity breakdown shows how chase tiers are distributed within the expansion. Each card carries a Chase Index — a community-driven signal of what collectors are actively chasing right now.
■ Key facts
- Release date
- August 3, 2016
- Set code
- STS
- Series
- XY
- Total cards
- 116
- Chase tiers
- 2 cards · 1 tier
- Reverse holos
- 93
Rarity breakdown
Common
31
Uncommon
30
Rare
23
Rare Holo
9
Rare Ultra
8
Rare BREAK
7
Rare Holo EX
6
Rare Secret
2
■ Full set
Complete Steam Siege card list
Steam Siege contains 116 cards, including 114 main-set cards and 2 secret rares. Every printing is linked in the server-rendered checklist below; the image browser stays fast by loading in pages of 30.
Steam Siege№ 112
M Gardevoir-EX
$59.86Details
Steam Siege№ 115
Volcanion-EX
$37.75Details
Steam Siege№ 109
M Steelix-EX
$30Details
Steam Siege№ 111
Gardevoir-EX
$26.37Details
Steam Siege№ 79
M Gardevoir-EX
$22.86Details
Steam Siege№ 108
Steelix-EX
$18.46Details
Steam Siege№ 114
Professor Sycamore
$11.94Details
Steam Siege№ 68
M Steelix-EX
$10.13Details
Steam Siege№ 107
Volcanion-EX
$10.06Details
Steam Siege№ 110
Magearna-EX
$9.27Details
Steam Siege№ 66
Yveltal BREAK
$8.40Details
Steam Siege№ 113
Pokémon Ranger
$7.74Details
Steam Siege№ 82
Xerneas BREAK
$7.40Details
Steam Siege№ 87
Hydreigon BREAK
$5.75Details
Steam Siege№ 78
Gardevoir-EX
$4.83Details
Steam Siege№ 21
Talonflame BREAK
$4.48Details
Steam Siege№ 24
Pyroar BREAK
$4.14Details
Steam Siege№ 35
Clawitzer BREAK
$3.62Details
Steam Siege№ 26
Volcanion-EX
$2.80Details
Steam Siege№ 8
Yanmega BREAK
$2.80Details
Steam Siege№ 67
Steelix-EX
$2.79Details
Steam Siege№ 50
Chandelure
$1.90Details
Steam Siege№ 77
Azumarill
$1.82Details
Steam Siege№ 20
Infernape
$1.71Details
Steam Siege№ 75
Magearna-EX
$1.51Details
Steam Siege№ 40
Ampharos
$1.22Details
Steam Siege№ 64
Bisharp
$1.08Details
Steam Siege№ 45
Nidoking
$0.83Details
Steam Siege№ 15
Volcarona
$0.82Details
Showing 30 of 116
Common31 cards
- #12 Foongus$0.40
- #76 Marill$0.38
- #88 Meowth$0.32
- #1 Tangela$0.30
- #38 Mareep$0.29
- #43 Nidoran ♂$0.29
- #14 Larvesta$0.27
- #30 Oshawott$0.26
- #18 Chimchar$0.25
- #90 Aipom$0.24
- #46 Drifloon$0.23
- #41 Joltik$0.23
- #16 Ponyta$0.22
- #52 Mankey$0.22
- #3 Hoppip$0.21
- #48 Litwick$0.20
- #28 Shellos$0.20
- #71 Klink$0.19
- #27 Mantine$0.19
- #92 Rufflet$0.18
- #60 Sneasel$0.17
- #94 Fletchling$0.16
- #36 Bergmite$0.16
- #54 Nosepass$0.15
- #84 Deino$0.15
- #6 Yanma$0.15
- #9 Seedot$0.15
- #58 Croagunk$0.13
- #33 Clauncher$0.13
- #22 Litleo$0.12
- #63 Pawniard$0.10
Uncommon30 cards
- #77 Azumarill$1.82
- #105 Special Charge$0.35
- #80 Klefki$0.29
- #39 Flaaffy$0.28
- #69 Shieldon$0.27
- #89 Persian$0.26
- #106 Steelix Spirit Link$0.26
- #44 Nidorino$0.24
- #19 Monferno$0.23
- #99 Captivating Poké Puff$0.23
- #100 Claw Fossil Anorith$0.22
- #98 Armor Fossil Shieldon$0.22
- #17 Rapidash$0.22
- #101 Gardevoir Spirit Link$0.22
- #4 Skiploom$0.21
- #49 Lampent$0.20
- #91 Ambipom$0.20
- #97 Hawlucha$0.20
- #56 Anorith$0.19
- #85 Zweilous$0.19
- #47 Drifblim$0.19
- #2 Tangrowth$0.18
- #104 Pokémon Ranger$0.18
- #95 Fletchinder$0.16
- #31 Dewott$0.16
- #93 Braviary$0.16
- #72 Klang$0.15
- #103 Ninja Boy$0.14
- #102 Greedy Dice$0.14
- #10 Nuzleaf$0.13
Rare23 cards
- #45 Nidoking$0.83
- #15 Volcarona$0.82
- #29 Gastrodon$0.61
- #42 Galvantula$0.47
- #32 Samurott$0.46
- #51 Hoopa$0.46
- #70 Bastiodon$0.45
- #37 Avalugg$0.44
- #57 Armaldo$0.43
- #74 Cobalion$0.39
- #96 Talonflame$0.39
- #5 Jumpluff$0.38
- #61 Weavile$0.36
- #25 Volcanion$0.33
- #53 Primeape$0.32
- #62 Spiritomb$0.31
- #83 Druddigon$0.29
- #34 Clawitzer$0.29
- #55 Probopass$0.27
- #13 Amoonguss$0.26
- #23 Pyroar$0.25
- #59 Toxicroak$0.21
- #7 Yanmega$0.20
Rare Holo9 cards
Rare Ultra8 cards
Rare BREAK7 cards
Rare Holo EX6 cards
Rare Secret2 cards
■ Series context
How does Steam Siege fit in the XY Series?
Steam Siege sits in the XY Series, released in 2016. It follows Fates Collide (2016) and precedes Evolutions (2016). Browse adjacent expansions below to compare chase cards, rarity distributions, and market trends across the series.
■ Common questions
Frequently asked about Steam Siege
Pricing, rarities, release info, and pack value — answered with current market data.
11 questions answered
Q.01How many cards are in Steam Siege?
Chase Season lists 116 cards in Steam Siege. Every card is linked in the complete checklist below.
Q.02What is the most valuable card in Steam Siege?
The top chase in Steam Siege is Gardevoir-EX (Rare Secret), currently priced at $109.26 on the holofoil market.
Q.03What are the top chase cards in Steam Siege?
The top chases in Steam Siege are led by Gardevoir-EX 116/114 at $109.26, then M Gardevoir-EX 112/114 and Volcanion-EX 115/114. See the <a href="#top-10">leading chase cards, ranked by current market value.
Q.04When was Steam Siege released?
Steam Siege was released on August 3, 2016 as part of the XY Series. It carries the set code STS.
Q.05How is the Chase Index calculated for Steam Siege?
The Chase Index is ordered by active collector chases. Within Steam Siege, cards with more active chases appear first.
Q.06Is Steam Siege rising or falling in value?
Tracked cards in Steam Siege have moved +3.2% over the past 30 days, based on market prices.
Q.07What rarities are in Steam Siege?
Steam Siege spans 8 distinct rarity tiers across 116 tracked cards. The most common are 31 Common, 30 Uncommon, 23 Rare. The chase tiers include 2 Rare Secrets.
Q.08Which Pokémon are featured in Steam Siege?
The headline cards in Steam Siege feature Gardevoir-EX, M Gardevoir-EX, Volcanion-EX, M Steelix-EX, Steelix-EX, alongside other species across the set's 8 rarity tiers. These top the Chase Index ranking inside Steam Siege based on current market value.
Q.09What card variants are available in Steam Siege?
Beyond the base print, Steam Siege includes 2 chase-tier cards across 1 premium rarity (2 Rare Secrets), plus 93 cards with a reverse-holo variant. Each variant is priced and tracked separately on Chase Season.
Q.10How does Steam Siege compare to Fates Collide?
Steam Siege (2016) is an expansion in the XY Series that followed Fates Collide (2016). It tracks 116 cards versus 129 in Fates Collide, with a top chase of $109.26 against $184.75 in its predecessor.
Q.11Are Steam Siege booster packs worth opening?
Pack value in Steam Siege depends on pull rates and current market prices, neither of which Chase Season predicts. As reference: the set contains 2 chase-tier pulls across 1 premium rarity, led by Gardevoir-EX at $109.26. The average tracked card across Steam Siege is worth $3.75.