Much of Chasm’s appeal comes from the random nature of the adventure. The procedurally generated Metroidvania world creates a dynamic situation where combat and exploration are always surprising. Twisted confinements in this underground lair littered with all matter of dangerous creatures and environmental hazards form a deadly dance of evading and slashing. Some of the random environments can link together for vexing platforming challenges and lopsided enemy variety but the tension created by Chasm’s chance placement means that nothing you encounter is expected.
Source: N4G PC Chasm Review – NoobFeed