Kingdom Rush 6: Genesis TD demo: Steam Next Fest download

Open the Kingdom Rush 6: Genesis TD Demo store page for AppID 4669880 (or the main AppID 4259190 right-rail during the festival window) and use the Steam Next Fest demo access button. Steam demos install through the regular Steam client once added to your library. The demo is also surfaced through the Steam Next Fest hub on Steam for the duration of the festival window.

The Steam Next Fest demo ships with a curated subset of the launch build: 4 of the 18 stages, 5 of the 15 towers, 2 of the 12 heroes (Gerald and Zefira), 3 of the 9 spells (Reinforcements, Rain of Fire, Royal Edict), and the Iron Challenge mode. Per the Steam demo store page (AppID 4669880) and the Ironhide Jun 15, 2026 gamespress.com release, this is the official pre-purchase trial scope. Use it to confirm the pair-deployment feel, the revamped four-family tower upgrade path, and the Iron Challenge difficulty before committing to the -30% pre-order.

The demo is a 4-of-18, 5-of-15, 2-of-12, 3-of-9 slice — early Linirea stages, a tower sample across the 4 classic families, the Gerald + Zefira pair, and a 3-spell subset. The Iron Challenge mode is the demo's named difficulty path. The launch build expands each axis: 18 stages across 3 Linirea regions, 15 towers, the full 12-hero pair-deployment roster, and all 9 spells. Treat the demo as a feel check; treat the Steam store page for AppID 4259190 as the launch-build reference.

After the planned September 24, 2026 launch, the Steam Next Fest demo window closes, but the demo usually remains available as a pre-purchase trial on the Steam store page. If you skip pre-order and want to try before buying, check the live Steam store page near ship day for the post-launch demo availability badge.