The solo dungeon crawler uses genes, mutations, chain-based skills, And Has a Demo Available.
IRSEN, a turn-based roguelite dungeon crawler from solo developer Ihar Sirotsin, also known as Datchannin, now has a free public demo available on Steam. The game is currently in development for PC, with the full release still to be announced.
The premise starts after a catastrophic event makes the surface unlivable. Beneath it, a mutant ecosystem has formed, shaped by radiation, biological corruption, and creatures that have adapted to survive there. The player controls a lone survivor descending into that underground world, using the same genetic material that makes the enemies dangerous.
What makes IRSEN stand out is its “reverse RPG party” setup. The player does not command a full team. They control one evolving character who has to face enemy groups built like traditional RPG parties.
Some enemies act as frontliners, others heal, apply support effects, deal damage, or behave like boss units that change the rhythm of a fight. That gives combat a clear focus on target priority, and reading the enemy squad before it takes control of the battle.
Progression revolves around genes, mutations, and buildcrafting. Between fights, players collect genetic material, reshape their character, unlock chain-based skills, and modify how abilities work.
Skill properties can change damage types, tactical roles, or the way certain actions fit into a build. Corruption also plays into the run structure, forcing players to decide how much risk they are willing to accept for more power.
The demo includes a complete playable loop and gives an early look at the game’s tactical structure. IRSEN is planned for PC via Steam, while the full version remains in development.
