Tangela
Common
$0.27Details
Pokémon TCG expansion
Steam Siege card list
116 cards in the XY Series, led by Gardevoir-EX at $108.97.
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 $108.97 on the open market. The set features 2 Rare Secrets, with the average tracked card valued at $3.70. Tracked cards have moved -0.8% over the past 7 days.
■ Highest-value cards
Steam Siege chase cards
■ Full set
Complete Steam Siege card list
Steam Siege contains 116 cards, including 114 main-set cards and 2 secret rares. Search by name or card number, filter by rarity, or compare prices.
116 of 116 cards
- TangrowthUncommon$0.17Details
- HoppipCommon$0.22Details
- SkiploomUncommon$0.24Details
- JumpluffRare$0.39Details
- YanmaCommon$0.18Details
- YanmegaRare$0.21Details
- Yanmega BREAKRare BREAK$2.97Details
- SeedotCommon$0.18Details
- NuzleafUncommon$0.14Details
- ShiftryRare Holo$0.72Details
- FoongusCommon$0.43Details
- AmoongussRare$0.28Details
- LarvestaCommon$0.33Details
- VolcaronaRare$0.82Details
- PonytaCommon$0.19Details
- RapidashUncommon$0.29Details
- ChimcharCommon$0.19Details
- MonfernoUncommon$0.25Details
- InfernapeRare Holo$1.16Details
- Talonflame BREAKRare BREAK$5.03Details
- LitleoCommon$0.16Details
- PyroarRare$0.28Details
- Pyroar BREAKRare BREAK$3.25Details
- VolcanionRare$0.32Details
- Volcanion-EXRare Holo EX$2.87Details
- MantineCommon$0.23Details
- ShellosCommon$0.24Details
- GastrodonRare$0.62Details
- OshawottCommon$0.27Details
- DewottUncommon$0.19Details
- SamurottRare$0.38Details
- ClauncherCommon$0.13Details
- ClawitzerRare$0.32Details
- Clawitzer BREAKRare BREAK$3.43Details
- BergmiteCommon$0.18Details
- AvaluggRare$0.55Details
- MareepCommon$0.26Details
- FlaaffyUncommon$0.25Details
- AmpharosRare Holo$1.44Details
- JoltikCommon$0.27Details
- GalvantulaRare$0.45Details
- Nidoran ♂Common$0.24Details
- NidorinoUncommon$0.21Details
- NidokingRare$0.77Details
- DrifloonCommon$0.26Details
- DrifblimUncommon$0.26Details
- LitwickCommon$0.17Details
- LampentUncommon$0.24Details
- ChandelureRare Holo$2.34Details
- HoopaRare$0.47Details
- MankeyCommon$0.22Details
- PrimeapeRare$0.33Details
- NosepassCommon$0.17Details
- ProbopassRare$0.27Details
- AnorithUncommon$0.19Details
- ArmaldoRare$0.40Details
- CroagunkCommon$0.16Details
- ToxicroakRare$0.27Details
- SneaselCommon$0.20Details
- WeavileRare$0.40Details
- SpiritombRare$0.30Details
- PawniardCommon$0.12Details
- BisharpRare Holo$1.35Details
- YveltalRare Holo$0.62Details
- Yveltal BREAKRare BREAK$6.22Details
- Steelix-EXRare Holo EX$3.14Details
- M Steelix-EXRare Holo EX$10.68Details
- ShieldonUncommon$0.26Details
- BastiodonRare$0.50Details
- KlinkCommon$0.15Details
- KlangUncommon$0.16Details
- KlinklangRare Holo$0.51Details
- CobalionRare$0.36Details
- Magearna-EXRare Holo EX$1.55Details
- MarillCommon$0.38Details
- AzumarillUncommon$1.55Details
- Gardevoir-EXRare Holo EX$5.97Details
- M Gardevoir-EXRare Holo EX$23.36Details
- KlefkiUncommon$0.31Details
- XerneasRare Holo$0.90Details
- Xerneas BREAKRare BREAK$7.61Details
- DruddigonRare$0.31Details
- DeinoCommon$0.16Details
- ZweilousUncommon$0.24Details
- HydreigonRare Holo$0.42Details
- Hydreigon BREAKRare BREAK$5.68Details
- MeowthCommon$0.35Details
- PersianUncommon$0.27Details
- AipomCommon$0.24Details
- AmbipomUncommon$0.18Details
- RuffletCommon$0.15Details
- BraviaryUncommon$0.16Details
- FletchlingCommon$0.16Details
- FletchinderUncommon$0.15Details
- TalonflameRare$0.37Details
- HawluchaUncommon$0.24Details
- Armor Fossil ShieldonUncommon$0.22Details
- Captivating Poké PuffUncommon$0.21Details
- Claw Fossil AnorithUncommon$0.25Details
- Gardevoir Spirit LinkUncommon$0.22Details
- Greedy DiceUncommon$0.15Details
- Ninja BoyUncommon$0.15Details
- Pokémon RangerUncommon$0.14Details
- Special ChargeUncommon$0.36Details
- Steelix Spirit LinkUncommon$0.20Details
- Volcanion-EXRare Ultra$9.92Details
- Steelix-EXRare Ultra$17.43Details
- M Steelix-EXRare Ultra$28.33Details
- Magearna-EXRare Ultra$9.42Details
- Gardevoir-EXRare Ultra$26.80Details
- M Gardevoir-EXRare Ultra$57.44Details
- Pokémon RangerRare Ultra$6.88Details
- Professor SycamoreRare Ultra$13.82Details
- Volcanion-EXRare Secret$34.92Details
- Gardevoir-EXRare Secret$108.97Details
■ 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
■ 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.
How many cards are in Steam Siege?
Chase Season lists 116 cards in Steam Siege. Every card is linked in the complete checklist above.
What is the most valuable card in Steam Siege?
The highest-priced tracked card in Steam Siege is Gardevoir-EX (Rare Secret), currently priced at $108.97 in the tracked price data.
What are the top chase cards in Steam Siege?
The top chases in Steam Siege are led by Gardevoir-EX 116/114 at $108.97, then M Gardevoir-EX 112/114 and Volcanion-EX 115/114. See the leading chase cards, ranked by current market value.
When was Steam Siege released?
Steam Siege was released on August 3, 2016 as part of the XY Series. It carries the set code STS.
How 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.
Is Steam Siege rising or falling in value?
Tracked cards in Steam Siege have moved -0.8% over the past 7 days and -0.6% over the past 30 days, based on market prices.
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 premium rarity tiers include 2 Rare Secrets.
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, alongside other species across the set's 8 rarity tiers. These examples are selected by current market value. The Chase Index ranks cards by active collector chases.
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.
How 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 $108.97 against $165.87 in its predecessor.
Are Steam Siege booster packs worth opening?
Pack value in Steam Siege depends on pull rates and current market prices. Card prices alone do not show what a pack is likely to contain. The highest-priced tracked card is Gardevoir-EX at $108.97. The average tracked card price is $3.70; this is not an expected return per pack.