NullPtr

Here is an excerpt from NullPtr's Steam description:

NULLPTR is a real-time tactical hacking puzzle, nominated as a finalist for Innovation and Best Brazilian Game at Gamescom LATAM 2024, where every action you take reshapes the challenge ahead. Infiltrate megacorp servers, reroute connections, collect valuable data, and outmaneuver adaptive defenses, all while racing against the clock and the relentless threat of reactive sentinels.

KEY FEATURES

• Real-time tactical puzzles – Every move matters as adaptive defense systems react dynamically to your actions.
• 20-second infiltration window – Plan carefully and execute quickly before the trace monitor locks you out.
• Reversible routes – Your movement leaves behind a visible trace; retrace your steps to erase it and reduce your exposure.
• Stack memory system – Store, reorder, and rewrite data nodes to alter the environment and exploit the system.
• Adaptive defenses – Sentinels, gates and firewalls respond to your behavior, turning obstacles into potential tools if used cleverly.
• Challenging progression – Over 125 handcrafted stages across four powerful megacorporations, each with unique security systems.