Half-Life: Decay vs Half-Life: Opposing Force
Side-by-side comparison of features, pricing, ratings, and alternatives.
Half-Life: Decay is the third expansion to Valve's iconic first‑person shooter, released exclusively for the PlayStation 2 in November 2001. Developed by Gearbox Software and published by Sierra Entertainment, the game retells the Black Mesa incident from the perspective of two research scientists, Gina Cross and Colette Green, and is designed for split‑screen cooperative play. The experience blends classic shooter action with platforming and puzzle elements, requiring both players to coordinate their actions to progress through the facility, repair equipment, and survive the resonance cascade aftermath. Its unique co‑op focus makes it a distinct chapter in the Half‑Life universe, emphasizing teamwork over solo heroics.
Half-Life: Opposing Force puts you in the role of US Marine Corporal Adrian Shephard, sent to contain the Black Mesa disaster. Experience the iconic Black Mesa facility from a fresh perspective with new weapons, enemies, and a compelling storyline. The expansion adds cooperative AI teammates, unique weapons, and challenging puzzles, all while maintaining the series' signature physics-driven gameplay. Available on Linux, PC, and Mac, it offers both single-player and multiplayer modes for varied play styles.
- Unique co‑op perspective on a classic story
- Split‑screen play without online lag
- Blend of shooter, platforming, and puzzles
- Authentic PS2 experience with original graphics
- Fresh narrative perspective on the Half-Life universe
- Adds new weapons and enemy types
- Solid physics-based puzzles
- Supports both single-player and multiplayer
- Limited to PlayStation 2 hardware
- No online multiplayer support
- Short campaign length compared to main game
- Graphics are dated compared to modern titles
- Multiplayer community is small
- Limited replay value after campaign completion
