Digging into developing a multi-Titan game and I think I've managed to hit on a game mode that enables players to play Titanomachina with multiple Titans per side.
Each player has two or more Titans where each Titan gets five cards from their Titan deck laid out on the table. Players take turns in initative order activating systems by rotating them 180 degrees (and flipping over any cards necessary to charge a system for activation). Players cannot activate a Titan again until all over Titans under their care control have activated a system (or can't activate a system).
At the end of a round, when no more activations are possible, players can reset or replace the cards in their Titan's rows.
Titans are reduced to single targets with a single stack of shield tokens. For every three points of damage they accumulate, the attacker can select a card from the targets row and claim it to score the system.
Reactions are slightly changed. Reactions rotate a card like it was activated. Blocks turn Impact and Grapple effects into 45 degree turns, and offers that system up for destruction instead of the target. Intercepts reduce the amount of incoming damage by 1 point. Emergency Power allows a player to play a reaction using a card that was rotated or flipped. Emergency Venting increases the cost of activating a system to attack within range 1.
Armour Piercing enables the attacking Titan to claim two destroyed systems instead of 1. High Explosive adds damage to a system's cogs. Impact and Grapple always pushes (or pulls) a Titan, only doing one point of damage for collisions. Shock makes a player flip over one of their Titan's unactivated cards.
