Default bindings for every input method Alien Swarm supports. These are the game's own defaults — anything you have remapped will differ.
Default keyboard and mouse bindings.
| Action | Default input |
|---|---|
| Move | W, A, S, D |
| Action | Default input |
|---|---|
| Aim / fire | Mouse / Left Mouse |
| Secondary fire / melee | Right Mouse |
| Reload | R |
| Switch weapons | 1–4 / Mouse Wheel |
| Action |
|---|
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| Default input |
|---|
| Use / pick up | E |
|---|
| Action | Default input |
|---|---|
| Marine orders | Shift |
Verified against the game by PlayBound.
Default gamepad layout, using the standard face-button names.
| Action | Default input |
|---|---|
| Move / aim | Left / Right Stick |
| Action | Default input |
|---|---|
| Fire / secondary fire | Right / Left Trigger |
| Switch weapon | Y |
| Melee | Right Bumper |
| Action | Default input |
|---|---|
| Reload / use | X / A |
Verified against the game by PlayBound.