Alien Swarm vs Zamb! Biomutant Extermination

Alien Swarm drops you and up to three friends into a hostile off‑world colony, forcing you to coordinate tactics and choose from four distinct marine classes. The free‑to‑play title blends intense shooter action with squad‑level strategy as you clear icy surfaces and lava‑filled mines of relentless alien threats. Beyond the core campaign, the game includes the full Source SDK code, offering developers access to a 3rd‑person camera, depth of field, dynamic shadows, and numerous gameplay enhancements for modding and custom content creation.

Play as two elite operatives battling a mad scientist's mutant army across 24 challenging levels. The game blends strategic skill development with fast‑paced action, letting you solo or team up with a friend for cooperative chaos. Upgrade your agents, master unique abilities, and push deeper into the secret asteroid facility to stop the mutant threat before it spreads across the universe.

• Free to download and play
• Deep tactical squad mechanics
• Extensive modding support with full source code
• Varied environments and alien types

• Engaging co‑op experience
• Deep skill‑tree customization
• Varied level design keeps gameplay fresh
• Indie charm with solid production values

• Limited graphics compared to modern shooters
• Multiplayer may feel empty without a community
• Steep learning curve for class coordination

• Limited platform availability (PC only)
• Short overall campaign length
• Graphics are modest compared to AAA titles