Cult of the Lamb Steam Deck: System Requirements and Performance

Cult of the Lamb is Verified on the Steam Deck, so you can play Massive Monster’s roguelike on Valve’s handheld without waiting on a patch. Valve’s compatibility report gives the device a Verified rating, with the interface text legible and the default configuration performant. The separate SteamOS rating is Playable, and ProtonDB’s player reports put the game at Platinum across 262 reports.

• Steam Deck: Verified by Valve. SteamOS category: Playable.
• ProtonDB: Platinum, 262 reports, “strong” confidence.
• PC minimum: an i3-3240 or FX-4300, 4 GB of RAM, a GTX 560 Ti and 4 GB of storage.
• Price: $24.99 on Steam and $24.99 on Nintendo Switch. The Switch 2 upgrade is free if you already own the Switch version.
• Local co-op: the base game now includes the Unholy Alliance expansion, which adds two-player crusades.

Does Cult of the Lamb run on Steam Deck?

Valve’s own compatibility report is itemized. It passes the default controller configuration check, confirms the on-device glyphs match, says the interface text is legible and marks the default configuration as performant. Every one of those is a green light for handheld sessions.

Two details in the report are worth reading twice. Verified is Valve’s top compatibility rating, and the SteamOS category is listed separately here as Playable, so the game is comfortable on the hardware but is not part of Valve’s curated SteamOS library. And the report flags that external controllers are not supported for the primary player, which means the Deck’s own sticks and buttons are the safe option, with Remote Play on a TV covering the couch instead.

Player reports agree with the hardware test. ProtonDB is the player-report database where people submit how a game runs on Linux and SteamOS, and its summary shows a Platinum tier from 262 reports, with a confidence rating of “strong” and a score of 0.94.

What are the PC requirements?

The Steam store page lists a very light bar for a game with this much going on:

Two footnotes from the same page matter. The minimum operating system is Windows 7, but Steam says its own client only supports Windows 10 and later from January 1, 2024, so Windows 10 is the practical floor. The store also lists macOS, with OS 10.9 and an Intel Core i5-6500 at the minimum.

How much space do you need?

Storage is a non-issue on PC: both the minimum and recommended requirement is 4 GB of available space. Nintendo’s own listing for the Switch and Switch 2 versions gives a tighter picture, with a 1.9 GB download for Switch and a 4.1 GB download for Switch 2. The release calendar has the launch date and the rest of the week’s games.

Is the Switch 2 version worth switching to?

If you own Cult of the Lamb on the original Switch, the answer is free. The official account’s announcement says the Switch 2 version arrived on October 22, that anyone who already owns the Switch version can upgrade for free, and that new buyers pay the same price as the Switch 1 version, $24.99. Our Switch 2 launch story covers what the studio did and did not promise.

The catch is that the studio did not promise anything new. The announcement was about the date, the free upgrade and the price, and no Switch 2-specific features were listed. If your plan is to play on a handheld screen, either version works. If your plan is to play on a big television with a controller, the Steam Deck or the PC build is the better call.

Does Cult of the Lamb have co-op?

Yes, and it is in the base game now. The Unholy Alliance expansion on the store page adds local co-op for the whole campaign, with one player taking the Lamb and the other taking the Goat. Two-player twists on existing minigames such as fishing and knucklebones are included, along with corrupted weapons, tarot cards, curses and relics. Solo players get new powers and abilities from the same expansion, and the free Sins of the Flesh content update adds follower doctrines, a new levelling system and the Blunderbuss weapon.

Steam’s feature list tags the game for multi-player, co-op and shared screen co-op.

What is Woolhaven, and can you play it on Deck?

Woolhaven is the paid expansion on Steam, priced at $16.99 and released on January 22, 2026. It moves the cult to a frozen mountain where a long-silenced deity stirs, and it adds ranching for wool, warmth and meat, two new dungeons, 52 new follower forms, 68 new cult decorations and 17 new buildings, plus new fleeces, outfits, tarot cards, relics, curses and weapons.

Because it is a Steam download, it installs with the base game on Deck, so there is no separate handheld version to buy. One warning from the expansion’s own store page: the content only becomes accessible near completion of the base game. Buy it before you start, not when you finish.

How much does everything cost?

The three packs are cosmetic extras sold separately on Steam, and the soundtrack is the full album instead of a sample. Add them to the $24.99 game and the soundtrack plus all three packs comes to $51.95.

Should you buy it on Deck or Switch 2?

• You already own the Switch version: upgrade to Switch 2 for free and keep your save.
• You want the handheld with the biggest screen: the Switch 2 build is the one with the free upgrade path, at $24.99.
• You want couch co-op or a television: the Steam Deck with Remote Play, or the PC build, handles the two-player campaign better.
• You want the soundtrack and every pack: on PC that is $51.95 in total, and each extra is a separate purchase.

Valve’s report and the player reports line up, which is rare enough to be worth stating plainly. The hardware test says the interface is legible, the controls work and the default configuration performs on Deck hardware, while 262 ProtonDB reports put the Linux build at Platinum. The two caution flags are small and specific: external controllers are not supported for the primary player, and the SteamOS category is Playable rather than Verified, so the game is not part of Valve’s curated library. None of that changes the recommendation, because Cult of the Lamb is a small 4 GB game with a 2022 spec sheet that any Deck can run, and the real decision for handheld players is not the hardware. It is which store you already own the game on, since the Switch 2 upgrade is free and the PC copy lets you add the soundtrack and the packs one at a time.

Edited by Kerwin Stewart, Editor-in-Chief · How we report