Chase Season
Chase IndexSetsErasPokédexLists
Home/XY/Steam Siege
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 $88.94 on the open market. The set features 2 Rare Secrets, with the average tracked card valued at $3.25. Tracked cards have moved -7.0% over the past 7 days.

Browse all cardsView Top 10
Cards tracked
116
with pricing
Top chase
$89
highest card
Avg value
$3
per card
Total value
$377
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
$88.94
Score 55
#02
M Gardevoir-EX – Rare Ultra – Steam Siege
M Gardevoir-EX
Rare Ultra
$48.77
Score 55
#03
Volcanion-EX – Rare Secret – Steam Siege
Volcanion-EX
Rare Secret
$34.20
Score 49
#04
M Steelix-EX – Rare Ultra – Steam Siege
M Steelix-EX
Rare Ultra
$26.61
Score 54
#05
M Gardevoir-EX – Rare Holo EX – Steam Siege
M Gardevoir-EX
Rare Holo EX
$21.99
Score 53
#06
Gardevoir-EX – Rare Ultra – Steam Siege
Gardevoir-EX
Rare Ultra
$20.13
Score 53
#07
Steelix-EX – Rare Ultra – Steam Siege
Steelix-EX
Rare Ultra
$18.82
Score 53
#08
M Steelix-EX – Rare Holo EX – Steam Siege
M Steelix-EX
Rare Holo EX
$10.96
Score 52
#09
Professor Sycamore – Rare Ultra – Steam Siege
Professor Sycamore
Rare Ultra
$10.49
Score 52
#10
Magearna-EX – Rare Ultra – Steam Siege
Magearna-EX
Rare Ultra
$8.95
Score 51
■ 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, ranked by Chase Index. Search by name, sort by price or card number, and click any row for the full card detail with live market pricing.

116 cards
RankCardRarityPrice7dScore
01
Gardevoir-EX – Rare Secret
Gardevoir-EX
Pokémon · #116
Rare Secret$88.94+2.4%
55
02
M Gardevoir-EX – Rare Ultra
M Gardevoir-EX
Pokémon · #112
Rare Ultra$48.77+0.5%
55
03
M Steelix-EX – Rare Ultra
M Steelix-EX
Pokémon · #109
Rare Ultra$26.61-0.3%
54
04
M Gardevoir-EX – Rare Holo EX
M Gardevoir-EX
Pokémon · #79
Rare Holo EX$21.99+6.0%
53
05
Gardevoir-EX – Rare Ultra
Gardevoir-EX
Pokémon · #111
Rare Ultra$20.13-0.3%
53
06
Steelix-EX – Rare Ultra
Steelix-EX
Pokémon · #108
Rare Ultra$18.82+0.2%
53
07
M Steelix-EX – Rare Holo EX
M Steelix-EX
Pokémon · #68
Rare Holo EX$10.96-1.4%
52
08
Professor Sycamore – Rare Ultra
Professor Sycamore
Trainer · #114
Rare Ultra$10.49+2.1%
52
09
Magearna-EX – Rare Ultra
Magearna-EX
Pokémon · #110
Rare Ultra$8.95+7.1%
51
10
Pokémon Ranger – Rare Ultra
Pokémon Ranger
Trainer · #113
Rare Ultra$7.52-1.2%
50
11
Yveltal BREAK – Rare BREAK
Yveltal BREAK
Pokémon · #66
Rare BREAK$6.29+0.5%
50
12
Xerneas BREAK – Rare BREAK
Xerneas BREAK
Pokémon · #82
Rare BREAK$5.99+2.9%
50
13
Volcanion-EX – Rare Secret
Volcanion-EX
Pokémon · #115
Rare Secret$34.20+0.1%
49
14
Gardevoir-EX – Rare Holo EX
Gardevoir-EX
Pokémon · #78
Rare Holo EX$4.83+2.5%
49
15
Pyroar BREAK – Rare BREAK
Pyroar BREAK
Pokémon · #24
Rare BREAK$3.86-0.3%
48
16
Volcanion-EX – Rare Holo EX
Volcanion-EX
Pokémon · #26
Rare Holo EX$3.13+7.6%
47
17
Yanmega BREAK – Rare BREAK
Yanmega BREAK
Pokémon · #8
Rare BREAK$2.85+7.1%
47
18
Steelix-EX – Rare Holo EX
Steelix-EX
Pokémon · #67
Rare Holo EX$2.28+5.6%
46
19
Magearna-EX – Rare Holo EX
Magearna-EX
Pokémon · #75
Rare Holo EX$1.65+0.6%
46
20
Volcanion-EX – Rare Ultra
Volcanion-EX
Pokémon · #107
Rare Ultra$8.40-0.2%
46
21
Chandelure – Rare Holo
Chandelure+RH
Pokémon · #50
Rare Holo$0.96+7.9%
44
22
Hydreigon BREAK – Rare BREAK
Hydreigon BREAK
Pokémon · #87
Rare BREAK$5.59+3.5%
44
23
Volcarona – Rare
Volcarona+RH
Pokémon · #15
Rare$0.89-67.0%
44
24
Talonflame BREAK – Rare BREAK
Talonflame BREAK
Pokémon · #21
Rare BREAK$4.22+6.8%
43
25
Xerneas – Rare Holo
Xerneas+RH
Pokémon · #81
Rare Holo$0.86+1.2%
43
26
Bisharp – Rare Holo
Bisharp+RH
Pokémon · #64
Rare Holo$0.86-1.1%
43
27
Nidoking – Rare
Nidoking+RH
Pokémon · #45
Rare$0.63-79.1%
43
28
Galvantula – Rare
Galvantula+RH
Pokémon · #42
Rare$0.57-62.3%
42
29
Clawitzer BREAK – Rare BREAK
Clawitzer BREAK
Pokémon · #35
Rare BREAK$3.03+1.0%
42
30
Gastrodon – Rare
Gastrodon+RH
Pokémon · #29
Rare$0.55-26.7%
41
31
Yveltal – Rare Holo
Yveltal+RH
Pokémon · #65
Rare Holo$0.54+1.9%
41
32
Azumarill – Uncommon
Azumarill+RH
Pokémon · #77
Uncommon$1.31-87.8%
40
33
Shiftry – Rare Holo
Shiftry+RH
Pokémon · #11
Rare Holo$0.46-8.0%
40
34
Hydreigon – Rare Holo
Hydreigon+RH
Pokémon · #86
Rare Holo$0.45+4.7%
40
35
Ampharos – Rare Holo
Ampharos+RH
Pokémon · #40
Rare Holo$1.09+6.9%
40
36
Talonflame – Rare
Talonflame+RH
Pokémon · #96
Rare$0.44-32.3%
39
37
Bastiodon – Rare
Bastiodon+RH
Pokémon · #70
Rare$0.42-25.0%
39
38
Cobalion – Rare
Cobalion+RH
Pokémon · #74
Rare$0.40-42.0%
38
39
Armaldo – Rare
Armaldo+RH
Pokémon · #57
Rare$0.39-39.1%
38
40
Samurott – Rare
Samurott+RH
Pokémon · #32
Rare$0.38-51.3%
37
41
Infernape – Rare Holo
Infernape+RH
Pokémon · #20
Rare Holo$0.61-1.6%
37
42
Volcanion – Rare
Volcanion+RH
Pokémon · #25
Rare$0.37-42.2%
36
43
Avalugg – Rare
Avalugg+RH
Pokémon · #37
Rare$0.49-22.2%
35
44
Weavile – Rare
Weavile+RH
Pokémon · #61
Rare$0.35-37.5%
35
45
Flaaffy – Uncommon
Flaaffy+RH
Pokémon · #39
Uncommon$0.31-26.2%
34
46
Jumpluff – Rare
Jumpluff+RH
Pokémon · #5
Rare$0.31-42.6%
34
47
Marill – Common
Marill+RH
Pokémon · #76
Common$0.29-57.4%
33
48
Klefki – Uncommon
Klefki+RH
Pokémon · #80
Uncommon$0.28-58.8%
33
49
Foongus – Common
Foongus+RH
Pokémon · #12
Common$0.27-55.0%
31
50
Clawitzer – Rare
Clawitzer+RH
Pokémon · #34
Rare$0.37-9.8%
31
51
Special Charge – Uncommon
Special Charge+RH
Trainer · #105
Uncommon$0.37-83.4%
31
52
Klinklang – Rare Holo
Klinklang+RH
Pokémon · #73
Rare Holo$0.26-3.7%
30
53
Larvesta – Common
Larvesta+RH
Pokémon · #14
Common$0.26-40.9%
30
54
Spiritomb – Rare
Spiritomb+RH
Pokémon · #62
Rare$0.35-37.5%
30
55
Toxicroak – Rare
Toxicroak+RH
Pokémon · #59
Rare$0.25-46.8%
30
56
Primeape – Rare
Primeape+RH
Pokémon · #53
Rare$0.29-49.1%
28
57
Joltik – Common
Joltik+RH
Pokémon · #41
Common$0.28-20.0%
27
58
Claw Fossil Anorith – Uncommon
Claw Fossil Anorith+RH
Trainer · #100
Uncommon$0.24-20.0%
27
59
Meowth – Common
Meowth+RH
Pokémon · #88
Common$0.24-50.0%
27
60
Nidoran ♂ – Common
Nidoran ♂+RH
Pokémon · #43
Common$0.24-54.7%
27
61
Hoopa – Rare
Hoopa+RH
Pokémon · #51
Rare$0.27-56.5%
26
62
Pyroar – Rare
Pyroar+RH
Pokémon · #23
Rare$0.27-42.6%
26
63
Druddigon – Rare
Druddigon+RH
Pokémon · #83
Rare$0.25-59.0%
24
64
Oshawott – Common
Oshawott+RH
Pokémon · #30
Common$0.22-51.1%
24
65
Anorith – Uncommon
Anorith+RH
Pokémon · #56
Uncommon$0.22-67.6%
24
66
Mareep – Common
Mareep+RH
Pokémon · #38
Common$0.22-50.0%
24
67
Rapidash – Uncommon
Rapidash+RH
Pokémon · #17
Uncommon$0.22-65.6%
24
68
Probopass – Rare
Probopass+RH
Pokémon · #55
Rare$0.22-42.1%
24
69
Persian – Uncommon
Persian+RH
Pokémon · #89
Uncommon$0.21-55.3%
23
70
Amoonguss – Rare
Amoonguss+RH
Pokémon · #13
Rare$0.24-51.0%
22
71
Shieldon – Uncommon
Shieldon+RH
Pokémon · #69
Uncommon$0.24-40.0%
22
72
Zweilous – Uncommon
Zweilous+RH
Pokémon · #85
Uncommon$0.20-44.4%
22
73
Drifblim – Uncommon
Drifblim+RH
Pokémon · #47
Uncommon$0.20-39.4%
22
74
Tangrowth – Uncommon
Tangrowth+RH
Pokémon · #2
Uncommon$0.12-78.2%
21
75
Gardevoir Spirit Link – Uncommon
Gardevoir Spirit Link+RH
Trainer · #101
Uncommon$0.23-53.1%
21
76
Monferno – Uncommon
Monferno+RH
Pokémon · #19
Uncommon$0.23-62.9%
21
77
Ninja Boy – Uncommon
Ninja Boy+RH
Trainer · #103
Uncommon$0.19-47.2%
19
78
Hawlucha – Uncommon
Hawlucha+RH
Pokémon · #97
Uncommon$0.19-61.2%
19
79
Lampent – Uncommon
Lampent+RH
Pokémon · #49
Uncommon$0.19-57.8%
19
80
Armor Fossil Shieldon – Uncommon
Armor Fossil Shieldon+RH
Trainer · #98
Uncommon$0.19-45.7%
19
81
Shellos – Common
Shellos+RH
Pokémon · #28
Common$0.19-40.6%
19
82
Mantine – Common
Mantine+RH
Pokémon · #27
Common$0.19-45.7%
19
83
Greedy Dice – Uncommon
Greedy Dice+RH
Trainer · #102
Uncommon$0.19-38.7%
19
84
Nidorino – Uncommon
Nidorino+RH
Pokémon · #44
Uncommon$0.21-61.8%
18
85
Hoppip – Common
Hoppip+RH
Pokémon · #3
Common$0.18-47.1%
18
86
Yanmega – Rare
Yanmega+RH
Pokémon · #7
Rare$0.20-61.5%
17
87
Steelix Spirit Link – Uncommon
Steelix Spirit Link+RH
Trainer · #106
Uncommon$0.17-59.5%
16
88
Deino – Common
Deino+RH
Pokémon · #84
Common$0.17-37.0%
16
89
Captivating Poké Puff – Uncommon
Captivating Poké Puff+RH
Trainer · #99
Uncommon$0.17-46.9%
16
90
Dewott – Uncommon
Dewott+RH
Pokémon · #31
Uncommon$0.17-58.5%
16
91
Sneasel – Common
Sneasel+RH
Pokémon · #60
Common$0.18-45.5%
13
92
Mankey – Common
Mankey+RH
Pokémon · #52
Common$0.18-37.9%
13
93
Clauncher – Common
Clauncher+RH
Pokémon · #33
Common$0.16-30.4%
12
94
Drifloon – Common
Drifloon+RH
Pokémon · #46
Common$0.16-50.0%
12
95
Fletchling – Common
Fletchling+RH
Pokémon · #94
Common$0.16-50.0%
12
96
Aipom – Common
Aipom+RH
Pokémon · #90
Common$0.16-68.0%
12
97
Braviary – Uncommon
Braviary+RH
Pokémon · #93
Uncommon$0.16-59.0%
12
98
Rufflet – Common
Rufflet+RH
Pokémon · #92
Common$0.16-40.7%
12
99
Skiploom – Uncommon
Skiploom+RH
Pokémon · #4
Uncommon$0.16-62.8%
12
100
Croagunk – Common
Croagunk+RH
Pokémon · #58
Common$0.15-53.1%
11
101
Pokémon Ranger – Uncommon
Pokémon Ranger+RH
Trainer · #104
Uncommon$0.15-63.4%
11
102
Tangela – Common
Tangela+RH
Pokémon · #1
Common$0.17-51.4%
10
103
Klang – Uncommon
Klang+RH
Pokémon · #72
Uncommon$0.14-62.2%
10
104
Klink – Common
Klink+RH
Pokémon · #71
Common$0.14-44.0%
10
105
Ponyta – Common
Ponyta+RH
Pokémon · #16
Common$0.13-69.0%
8
106
Fletchinder – Uncommon
Fletchinder+RH
Pokémon · #95
Uncommon$0.13-64.9%
8
107
Seedot – Common
Seedot+RH
Pokémon · #9
Common$0.13-55.2%
8
108
Ambipom – Uncommon
Ambipom+RH
Pokémon · #91
Uncommon$0.16-62.8%
7
109
Yanma – Common
Yanma+RH
Pokémon · #6
Common$0.12-42.9%
7
110
Pawniard – Common
Pawniard+RH
Pokémon · #63
Common$0.12-61.3%
7
111
Nosepass – Common
Nosepass+RH
Pokémon · #54
Common$0.11-76.1%
6
112
Bergmite – Common
Bergmite+RH
Pokémon · #36
Common$0.11-59.3%
6
113
Nuzleaf – Uncommon
Nuzleaf+RH
Pokémon · #10
Uncommon$0.10-64.3%
5
114
Litleo – Common
Litleo+RH
Pokémon · #22
Common$0.14-44.0%
4
115
Chimchar – Common
Chimchar+RH
Pokémon · #18
Common$0.14-68.9%
4
116
Litwick – Common
Litwick+RH
Pokémon · #48
Common$0.13-61.8%
3
■ 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: $125
Fates Collide
Fates Collide
2016 · 129 cards
Top: $141
Generations
Generations
2016 · 117 cards
Top: $158
BREAKpoint
BREAKpoint
2016 · 126 cards
Top: $160
■ 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 $88.94 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 (50%), 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 -7.0% over the past 7 days and — 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 $88.94 against $140.79 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 $88.94. The average tracked card across Steam Siege is worth $3.25.
Track what's chased.
Ignore what's hyped.
Live · Prices updated daily

Index

HomeChase IndexSetsErasPokédexListsAbout

Lists

Shiny VaultTrainer GalleryGalarian Gallery

New Sets

Perfect OrderAscended HeroesPhantasmal FlamesMega Evolution Promo

Popular Sets

Dragon FrontiersNeo DestinyHolon PhantomsTeam Up

Latest Eras

Mega EvolutionScarlet & VioletSword & ShieldAll eras ↗

Chase Season is an independent project and is not affiliated with, endorsed, sponsored, or specifically approved by Nintendo, Game Freak, Creatures Inc., The Pokémon Company, or Wizards of the Coast. Pokémon and all related names, logos, and characters are trademarks of Nintendo / Creatures Inc. / Game Freak. Card images are sourced from pokemontcg.io and remain the property of their respective owners.

© Chase Season · 2026
Built with ♥ from the Netherlands