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Steam SiegeXY · STS · 2016

Steam SiegePokémon TCG Set Overview & Chase Cards

Steam Siege (set code STS) is a 116-card Pokémon TCG expansion released in 2016 as part of the XY era. Its top chase is Gardevoir-EX (Rare Secret) at $97.66 on the open market. The set features 2 Rare Secrets, with the average tracked card valued at $3.61. Tracked cards have moved +1.3% over the past 7 days.

Browse all cardsView Top 10
Cards tracked
116
with pricing
Top chase
$98
highest card
Avg value
$4
per card
Total value
$418
all cards summed
Set total
116
cards in set
Rarities
8
distinct types
■ Chase Rankings

What are the top chase cards in Steam Siege?

Steam Siege · by price
#01 · Top Chase
Gardevoir-EX – Rare Secret – Steam Siege
Gardevoir-EX
Rare Secret
$97.66
Score 38
#02🔥
M Gardevoir-EX – Rare Ultra – Steam Siege
M Gardevoir-EX
Rare Ultra
$53.99
Score 90
#03
Volcanion-EX – Rare Secret – Steam Siege
Volcanion-EX
Rare Secret
$39.89
Score 34
#04
M Steelix-EX – Rare Ultra – Steam Siege
M Steelix-EX
Rare Ultra
$35.44
Score 37
#05
M Gardevoir-EX – Rare Holo EX – Steam Siege
M Gardevoir-EX
Rare Holo EX
$23.27
Score 44
#06
Gardevoir-EX – Rare Ultra – Steam Siege
Gardevoir-EX
Rare Ultra
$22.48
Score 35
#07
Steelix-EX – Rare Ultra – Steam Siege
Steelix-EX
Rare Ultra
$19.58
Score 34
#08
Professor Sycamore – Rare Ultra – Steam Siege
Professor Sycamore
Rare Ultra
$10.50
Score 14
#09
M Steelix-EX – Rare Holo EX – Steam Siege
M Steelix-EX
Rare Holo EX
$9.33
Score 14
#10
Magearna-EX – Rare Ultra – Steam Siege
Magearna-EX
Rare Ultra
$9.14
Score 36
■ 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 era. It spans 116 total 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.

■ Key facts
Release date
August 3, 2016
Set code
STS
Era
XY
Total cards
116 · 114 printed
Chase tiers
2 cards · 1 tier
Reverse holos
93
Rarity distribution
Common
31
Uncommon
30
Rare
23
Rare Holo
9
Rare Ultra
8
Rare BREAK
7
Rare Holo EX
6
Rare Secret
2
■ Full set

Browse all cards in Steam Siege

All 116 tracked cards in Steam Siege, ordered by price. Click any card for the full detail with live market pricing.

#15№ 116
Gardevoir-EX – Rare Secret
Gardevoir-EX
Rare Secret
$97.66+2.0%
Score 38
#01№ 112
M Gardevoir-EX – Rare Ultra
M Gardevoir-EX
Rare Ultra
$53.99+3.5%
Score 90
#35№ 115
Volcanion-EX – Rare Secret
Volcanion-EX
Rare Secret
$39.89+0.2%
Score 34
#18№ 109
M Steelix-EX – Rare Ultra
M Steelix-EX
Rare Ultra
$35.44+1.8%
Score 37
#03№ 79
M Gardevoir-EX – Rare Holo EX
M Gardevoir-EX
Rare Holo EX
$23.27+6.2%
Score 44
#26№ 111
Gardevoir-EX – Rare Ultra
Gardevoir-EX
Rare Ultra
$22.48+1.0%
Score 35
#33№ 108
Steelix-EX – Rare Ultra
Steelix-EX
Rare Ultra
$19.58+0.4%
Score 34
#54№ 114
Professor Sycamore – Rare Ultra
Professor Sycamore
Rare Ultra
$10.50-0.2%
Score 14
#55№ 68
M Steelix-EX – Rare Holo EX
M Steelix-EX
Rare Holo EX
$9.33-16.8%
Score 14
#25№ 110
Magearna-EX – Rare Ultra
Magearna-EX
Rare Ultra
$9.14+1.6%
Score 36
#32№ 107
Volcanion-EX – Rare Ultra
Volcanion-EX
Rare Ultra
$8.69+0.8%
Score 34
#28№ 82
Xerneas BREAK – Rare BREAK
Xerneas BREAK
Rare BREAK
$8.51+1.1%
Score 35
#46№ 66
Yveltal BREAK – Rare BREAK
Yveltal BREAK
Rare BREAK
$8.12+0.2%
Score 33
#27№ 113
Pokémon Ranger – Rare Ultra
Pokémon Ranger
Rare Ultra
$7.75+1.2%
Score 35
#37№ 87
Hydreigon BREAK – Rare BREAK
Hydreigon BREAK
Rare BREAK
$6.58+0.5%
Score 33
#56№ 78
Gardevoir-EX – Rare Holo EX
Gardevoir-EX
Rare Holo EX
$5.91-2.8%
Score 13
#34№ 21
Talonflame BREAK – Rare BREAK
Talonflame BREAK
Rare BREAK
$5.03+1.0%
Score 34
#57№ 24
Pyroar BREAK – Rare BREAK
Pyroar BREAK
Rare BREAK
$3.98-0.3%
Score 13
#30№ 35
Clawitzer BREAK – Rare BREAK
Clawitzer BREAK
Rare BREAK
$3.73+1.4%
Score 35
#58№ 26
Volcanion-EX – Rare Holo EX
Volcanion-EX
Rare Holo EX
$3.04-7.3%
Score 13
#14№ 8
Yanmega BREAK – Rare BREAK
Yanmega BREAK
Rare BREAK
$2.69+3.9%
Score 38
#10№ 67
Steelix-EX – Rare Holo EX
Steelix-EX
Rare Holo EX
$2.27+5.6%
Score 41
#02№ 77
Azumarill – Uncommon
Azumarill+RH
Uncommon
$1.68+25.4%
Score 47
#59№ 75
Magearna-EX – Rare Holo EX
Magearna-EX
Rare Holo EX
$1.52-1.3%
Score 12
#08№ 50
Chandelure – Rare Holo
Chandelure+RH
Rare Holo
$1.23+6.0%
Score 41
#31№ 64
Bisharp – Rare Holo
Bisharp+RH
Rare Holo
$1.21+1.7%
Score 34
#04№ 40
Ampharos – Rare Holo
Ampharos+RH
Rare Holo
$1.14+10.7%
Score 44
#17№ 15
Volcarona – Rare
Volcarona+RH
Rare
$0.96+4.3%
Score 38
#12№ 81
Xerneas – Rare Holo
Xerneas+RH
Rare Holo
$0.95+5.6%
Score 39
#29№ 20
Infernape – Rare Holo
Infernape+RH
Rare Holo
$0.94+2.2%
Score 35
#60№ 45
Nidoking – Rare
Nidoking+RH
Rare
$0.68-1.4%
Score 11
#61№ 11
Shiftry – Rare Holo
Shiftry+RH
Rare Holo
$0.57-3.4%
Score 11
#24№ 42
Galvantula – Rare
Galvantula+RH
Rare
$0.55+3.8%
Score 36
#62№ 65
Yveltal – Rare Holo
Yveltal+RH
Rare Holo
$0.540.0%
Score 11
#09№ 86
Hydreigon – Rare Holo
Hydreigon+RH
Rare Holo
$0.49+6.5%
Score 41
#63№ 29
Gastrodon – Rare
Gastrodon+RH
Rare
$0.470.0%
Score 10
#19№ 32
Samurott – Rare
Samurott+RH
Rare
$0.44+4.8%
Score 37
#64№ 76
Marill – Common
Marill+RH
Common
$0.430.0%
Score 10
#65№ 57
Armaldo – Rare
Armaldo+RH
Rare
$0.42-16.0%
Score 10
#05№ 105
Special Charge – Uncommon
Special Charge+RH
Uncommon
$0.40+14.3%
Score 43
#42№ 51
Hoopa – Rare
Hoopa+RH
Rare
$0.38+2.7%
Score 33
#43№ 37
Avalugg – Rare
Avalugg+RH
Rare
$0.38+2.7%
Score 33
#66№ 61
Weavile – Rare
Weavile+RH
Rare
$0.380.0%
Score 9
#67№ 70
Bastiodon – Rare
Bastiodon+RH
Rare
$0.38-5.0%
Score 9
#68№ 96
Talonflame – Rare
Talonflame+RH
Rare
$0.38-5.0%
Score 9
#69№ 25
Volcanion – Rare
Volcanion+RH
Rare
$0.360.0%
Score 9
#70№ 74
Cobalion – Rare
Cobalion+RH
Rare
$0.340.0%
Score 9
#44№ 53
Primeape – Rare
Primeape+RH
Rare
$0.31+3.3%
Score 33
#71№ 12
Foongus – Common
Foongus+RH
Common
$0.31-6.1%
Score 9
#72№ 34
Clawitzer – Rare
Clawitzer+RH
Rare
$0.31-6.1%
Score 9
#06№ 88
Meowth – Common
Meowth+RH
Common
$0.29+20.8%
Score 43
#73№ 73
Klinklang – Rare Holo
Klinklang+RH
Rare Holo
$0.29-3.3%
Score 8
#74№ 62
Spiritomb – Rare
Spiritomb+RH
Rare
$0.290.0%
Score 8
#13№ 23
Pyroar – Rare
Pyroar+RH
Rare
$0.28+7.7%
Score 39
#47№ 101
Gardevoir Spirit Link – Uncommon
Gardevoir Spirit Link+RH
Uncommon
$0.28+3.7%
Score 33
#38№ 5
Jumpluff – Rare
Jumpluff+RH
Rare
$0.27+3.8%
Score 33
#75№ 83
Druddigon – Rare
Druddigon+RH
Rare
$0.270.0%
Score 8
#76№ 80
Klefki – Uncommon
Klefki+RH
Uncommon
$0.260.0%
Score 7
#77№ 13
Amoonguss – Rare
Amoonguss+RH
Rare
$0.260.0%
Score 7
#78№ 106
Steelix Spirit Link – Uncommon
Steelix Spirit Link+RH
Uncommon
$0.250.0%
Score 7
#79№ 14
Larvesta – Common
Larvesta+RH
Common
$0.250.0%
Score 7
#07№ 46
Drifloon – Common
Drifloon+RH
Common
$0.24+33.3%
Score 42
#11№ 43
Nidoran ♂ – Common
Nidoran ♂+RH
Common
$0.24+20.0%
Score 40
#49№ 30
Oshawott – Common
Oshawott+RH
Common
$0.24+4.3%
Score 33
#80№ 59
Toxicroak – Rare
Toxicroak+RH
Rare
$0.240.0%
Score 7
#81№ 38
Mareep – Common
Mareep+RH
Common
$0.24-4.0%
Score 7
#40№ 27
Mantine – Common
Mantine+RH
Common
$0.23+4.5%
Score 33
#82№ 55
Probopass – Rare
Probopass+RH
Rare
$0.230.0%
Score 6
#39№ 19
Monferno – Uncommon
Monferno+RH
Uncommon
$0.22+4.8%
Score 33
#83№ 39
Flaaffy – Uncommon
Flaaffy+RH
Uncommon
$0.220.0%
Score 6
#20№ 99
Captivating Poké Puff – Uncommon
Captivating Poké Puff+RH
Uncommon
$0.21+10.5%
Score 37
#41№ 90
Aipom – Common
Aipom+RH
Common
$0.21+5.0%
Score 33
#84№ 17
Rapidash – Uncommon
Rapidash+RH
Uncommon
$0.21-4.5%
Score 5
#85№ 44
Nidorino – Uncommon
Nidorino+RH
Uncommon
$0.210.0%
Score 5
#86№ 16
Ponyta – Common
Ponyta+RH
Common
$0.210.0%
Score 5
#21№ 89
Persian – Uncommon
Persian+RH
Uncommon
$0.20+11.1%
Score 37
#87№ 56
Anorith – Uncommon
Anorith+RH
Uncommon
$0.20-9.1%
Score 5
#88№ 1
Tangela – Common
Tangela+RH
Common
$0.20-9.1%
Score 5
#89№ 41
Joltik – Common
Joltik+RH
Common
$0.20-16.7%
Score 5
#90№ 103
Ninja Boy – Uncommon
Ninja Boy+RH
Uncommon
$0.200.0%
Score 5
#48№ 7
Yanmega – Rare
Yanmega+RH
Rare
$0.19+5.6%
Score 33
#91№ 49
Lampent – Uncommon
Lampent+RH
Uncommon
$0.19-5.0%
Score 4
#16№ 52
Mankey – Common
Mankey+RH
Common
$0.18+20.0%
Score 38
#22№ 69
Shieldon – Uncommon
Shieldon+RH
Uncommon
$0.18+12.5%
Score 37
#50№ 4
Skiploom – Uncommon
Skiploom+RH
Uncommon
$0.18+5.9%
Score 33
#51№ 97
Hawlucha – Uncommon
Hawlucha+RH
Uncommon
$0.18+5.9%
Score 33
#92№ 3
Hoppip – Common
Hoppip+RH
Common
$0.180.0%
Score 4
#93№ 93
Braviary – Uncommon
Braviary+RH
Uncommon
$0.180.0%
Score 4
#23№ 60
Sneasel – Common
Sneasel+RH
Common
$0.17+13.3%
Score 36
#36№ 28
Shellos – Common
Shellos+RH
Common
$0.17+6.3%
Score 33
#94№ 104
Pokémon Ranger – Uncommon
Pokémon Ranger+RH
Uncommon
$0.170.0%
Score 3
#95№ 18
Chimchar – Common
Chimchar+RH
Common
$0.16-11.1%
Score 3
#96№ 102
Greedy Dice – Uncommon
Greedy Dice+RH
Uncommon
$0.160.0%
Score 3
#97№ 95
Fletchinder – Uncommon
Fletchinder+RH
Uncommon
$0.160.0%
Score 3
#98№ 100
Claw Fossil Anorith – Uncommon
Claw Fossil Anorith+RH
Uncommon
$0.160.0%
Score 3
#45№ 22
Litleo – Common
Litleo+RH
Common
$0.15+7.1%
Score 33
#99№ 94
Fletchling – Common
Fletchling+RH
Common
$0.150.0%
Score 2
#100№ 98
Armor Fossil Shieldon – Uncommon
Armor Fossil Shieldon+RH
Uncommon
$0.150.0%
Score 2
#101№ 84
Deino – Common
Deino+RH
Common
$0.150.0%
Score 2
#102№ 85
Zweilous – Uncommon
Zweilous+RH
Uncommon
$0.140.0%
Score 1
#103№ 71
Klink – Common
Klink+RH
Common
$0.14-6.7%
Score 1
#104№ 48
Litwick – Common
Litwick+RH
Common
$0.14-17.6%
Score 1
#105№ 91
Ambipom – Uncommon
Ambipom+RH
Uncommon
$0.140.0%
Score 1
#106№ 33
Clauncher – Common
Clauncher+RH
Common
$0.140.0%
Score 1
#107№ 31
Dewott – Uncommon
Dewott+RH
Uncommon
$0.140.0%
Score 1
#108№ 2
Tangrowth – Uncommon
Tangrowth+RH
Uncommon
$0.14-6.7%
Score 1
#52№ 9
Seedot – Common
Seedot+RH
Common
$0.13+8.3%
Score 32
#109№ 54
Nosepass – Common
Nosepass+RH
Common
$0.13-7.1%
Score 1
#110№ 47
Drifblim – Uncommon
Drifblim+RH
Uncommon
$0.12-7.7%
Score 1
#111№ 72
Klang – Uncommon
Klang+RH
Uncommon
$0.12-7.7%
Score 1
#53№ 58
Croagunk – Common
Croagunk+RH
Common
$0.11+10.0%
Score 32
#112№ 6
Yanma – Common
Yanma+RH
Common
$0.11-8.3%
Score 0
#113№ 92
Rufflet – Common
Rufflet+RH
Common
$0.110.0%
Score 0
#114№ 63
Pawniard – Common
Pawniard+RH
Common
$0.110.0%
Score 0
#115№ 36
Bergmite – Common
Bergmite+RH
Common
$0.110.0%
Score 0
#116№ 10
Nuzleaf – Uncommon
Nuzleaf+RH
Uncommon
$0.100.0%
Score 0
■ Era context

How does Steam Siege fit in the XY era?

Steam Siege sits in the XY era of the Pokémon TCG, 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 era.

Evolutions
Evolutions
2016 · 113 cards
Top: $152
Fates Collide
Fates Collide
2016 · 129 cards
Top: $143
Generations
Generations
2016 · 117 cards
Top: $213
BREAKpoint
BREAKpoint
2016 · 126 cards
Top: $190
■ Common questions

Frequently asked about Steam Siege

Pricing, rarities, release info, and pack value — answered with live market data. Updated daily.

10 questions answered
Q.01

How many cards are in Steam Siege?

Steam Siege contains 116 total cards (114 in the printed set). Chase Season currently tracks 116 cards with live pricing data.
Q.02

What is the most valuable card in Steam Siege?

The top chase in Steam Siege is Gardevoir-EX (Rare Secret), currently priced at $97.66 on the holofoil market.
Q.03

When was Steam Siege released?

Steam Siege was released in 2016 as part of the XY era. It carries the set code STS.
Q.04

How is the Chase Index calculated for Steam Siege?

The Chase Index is a composite score (0–100) that combines current market price percentile (15%), upward-only 7-day price-move percentile (35%), rolling 30-day community chase count (30%), and 7-day view activity (20%). Within Steam Siege, cards are ranked against each other so local rarity and interest are reflected accurately.
Q.05

Is Steam Siege rising or falling in value?

Tracked cards in Steam Siege have moved +1.3% over the past 7 days and +8.3% over the past 30 days, based on market prices.
Q.06

What 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.07

Which 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, Professor Sycamore, alongside other species across the set's 8 rarity tiers. These top the Chase Index ranking inside Steam Siege based on live market price.
Q.08

What 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.09

How does Steam Siege compare to Fates Collide?

Steam Siege (2016) is the XY-era expansion that followed Fates Collide (2016). It tracks 116 cards versus 129 in Fates Collide, with a top chase of $97.66 against $143.49 in its predecessor.
Q.10

Are 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 $97.66. The average tracked card across Steam Siege is worth $3.61.
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