Steam Deckbuilders Fest 2026: Two Days Left, Our Picks Lead with Die in the Dungeon and Gambonanza

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The Steam Deckbuilders Fest is in its final stretch. Discounts went live on May 4 at 10:00 AM PT and stay frozen until May 11 at 10:00 AM PT. That gives you roughly two days to grab anything you’ve been circling, with over 2,800 titles on sale and discounts climbing as high as 95% off on select games.

Most of these deals will not return until winter. If you’ve been waiting for the right moment to dig into the genre, this is it.

Our Selection

Two May 1, 2026 launches anchor our top picks of the fest, both at 35% off ($9.74). Discounts on a roguelike in its launch week are rare. These are the two to grab before May 11.

Die in the Dungeon

Die in the Dungeon by ATICO left early access and hit 1.0 on May 1. It is a deckbuilder, but your “deck” is a pool of 31 unique dice instead of cards.

You roll them and place them on a small grid where positioning matters as much as the value rolled. Some dice boost neighbors, some trigger off adjacency, some only fire when stacked. It’s a tactile re-imagining of the genre loop, and the 1.0 update added a new playable hero with a parry-based playstyle, character progression, a real ending, 142 unique relics, and a 92% Very Positive Steam rating across more than 2,500 reviews.

The hook is that every turn becomes a small spatial puzzle. You stop thinking about cards and start thinking about boards. If you bounced off card-based deckbuilders because the loop felt too abstract, this is the version where the math becomes physical again.

Gambonanza

Gambonanza by solo developer Blukulélé is the other May 1 launch worth your attention, even if it sits at the genre’s far edge. It’s a chess roguelike with deckbuilder DNA. Tiny boards, escalating runs, and over 150 Gambits that rewrite the rules of how pieces move and what tiles do.

The demo was one of the breakouts of Steam Next Fest in February, pulling more than 170,000 downloads, and the launch version expands on the demo’s strongest hooks. Published by Sidekick and Stray Fawn, both of whom have a track record of backing experimental hybrids.

If chess sounds like the wrong fit for a deckbuilder fest, that’s exactly the bet Gambonanza is making. The Gambit system does the same job a card pool does in a traditional roguelike, and the run economy is pure deckbuilder pacing.

The Genre Pillars Are Cheaper Than They’ve Ever Been

These three are the spine of the modern deckbuilder. Two of them are at near all-time lows. The third is rare on sale at all.

• Slay the Spire at 75% off ($6.24). The game that defined the genre in 2019. Even if you’ve already sunk hundreds of hours into the sequel, the original holds up. We covered why it still matters in our 10 best roguelike deckbuilders to play before Slay the Spire 2 roundup
• Inscryption at 60% off ($7.99). Daniel Mullins’ meta horror deckbuilder is one of the few card games that genuinely earns the word “unique.” If you only know it as “the creepy one with the cabin,” you owe it to yourself to find out what it actually is
• Balatro at 20% off ($11.99). LocalThunk’s poker roguelike rarely discounts at all. Twenty percent off is the deepest cut it has seen since launch. Our full Balatro review breaks down why the joker engine still hasn’t been topped

The Headline Steal: Monster Train at 80% Off

If you want the cheapest entry into a top-tier deckbuilder this fest, it’s this one.

Monster Train is 80% off ($4.99) for the duration of the fest. Shiny Shoe’s 2020 roguelike took the Slay the Spire formula and rebuilt it across a vertical, multi-floor battlefield where you defend three lanes simultaneously across five enemy waves per run. Five clans, two-clan combos, and a meta layer that opens new artifacts every prestige.

It scored 86 on Metacritic at launch and the community keeps going six years in. Monster Train 2 also launched in 2025 and remains popular, but the original is the right place to start. If you bounced off Slay the Spire because you wanted more meta depth, this is the answer.

Slay the Spire 2 Is Not in This Sale

If you came hunting for a discount on the sequel, save your wishlist alert. Slay the Spire 2 entered early access on March 5 and is not part of the fest. Mega Crit holds firm on early access pricing, which is consistent with how they treated the original through its own early access run.

What you can do instead is read up. The early access launch guide walks through the five characters and the new co-op layer. The March balance patch coverage explains why the review score dipped and what Mega Crit did about it. And if you’re still on the fence, our games like Slay the Spire 2 list has cheaper alternatives that scratch the same itch.

Demos Worth Installing Before May 11

The other half of this fest is the demo lineup. Steam’s themed sales now bundle in playable trials for upcoming and current titles, and the Deckbuilders Fest leans into that hard. Several of the demos shown off in the storefront filters are for games that are still months out from launch, which makes the next two days the cleanest window to test them before they get pulled.

The pattern matches what we covered during the Steam Next Fest February showcase: demo windows are the highest signal way to vet a deckbuilder before paying. Card games live or die on whether the loop hooks you in the first hour, and a demo is exactly long enough to find out.

How to Spend Twenty Dollars Well

If your budget is tight and you want a starter library that covers the genre’s full range, here’s the play.

• Slay the Spire ($6.24) gives you the foundational roguelike deckbuilder
• Monster Train ($4.99) gives you the genre’s best vertical-battlefield twist
• Inscryption ($7.99) gives you the genre at its most experimental

That’s three completely different design philosophies for $19.22. Add Die in the Dungeon ($9.74) if you want the dice variant, or Vault of the Void if you want a “Slay the Spire with deeper deck control” alternative we covered in our deckbuilder roundup. Both surfaced in our genre coverage.

After the Sale

If you blink and miss the May 11 cutoff, the next big window for these games is the Steam Summer Sale in late June. Discounts during themed fests usually match or beat the prices you’ll see in the seasonal sales though, so passing on Monster Train at $4.99 to wait for Summer is rarely the right move.

For a broader read on what to play right now without waiting for a sale, we keep our 2026 best of list and the March spring sale recap up to date with what’s actually worth your money.