Serious Sam: Shatterverse - Bosses
Bosses in Serious Sam: Shatterverse are the five lieutenants Mental sends after the squad, one per act of a run, plus the Shard of Mental as the campaign's final encounter. Each lieutenant is a rebuilt or corrupted version of a classic Serious Sam enemy or character, and each one is fought in its ow...
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of 6 entries
· updated 2026-09-15
| Name | Type | Description | Difficulty | Rewards | Source | Phases |
|---|---|---|---|---|---|---|
| Lava Golem | Mental Lieutenant | A gigantic Lava Golem that serves as one of Mental's five lieutenants. | High - area denial and heavy sustained damage | Lieutenant clear, run progression and Catalyst Orb payout | Act boss encounter in the Shatterverse arena ladder | — |
| Reptiloid Highlander | Mental Lieutenant | The Aludran Reptiloid Highlander, promoted from series enemy to lieutenant. | High - aggressive melee pressure | Lieutenant clear, run progression and Catalyst Orb payout | Act boss encounter in the Shatterverse arena ladder | — |
| Kleer God | Mental Lieutenant | A colossal Kleer that rules the Planet Kleer levels and serves as the act boss there. | High - fast charges and leap telegraphs | Lieutenant clear, run progression and Catalyst Orb payout | Act boss encountered in the Planet Kleer levels | — |
| Rogue NETRICSA | Mental Lieutenant | A corrupted version of the squad's own AI, fought as one of the five lieutenants. | High - timer pressure and arena-wide damage | Lieutenant clear, run progression and Catalyst Orb payout | Act boss encounter in the Shatterverse arena ladder | — |
| Inverse Sam | Mental Lieutenant | A mirror-timeline Sam who fights with an SBC Cannon mounted in one of his arms, voiced by Jack Meyers. | High - player-style duel with heavy cannon fire | Lieutenant clear, run progression and Catalyst Orb payout | Act boss encounter in the Shatterverse arena ladder | — |
| Shard of Mental | Final Boss | The campaign's final boss and the only time Mental's own power appears on the battlefield. | Very high - target identification under pressure | Campaign completion and endgame unlock progress | Final encounter of a completed run | Three phases: duplicate swarm, then add-heavy final phase |
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