Retro Gaming

Retro Game Compatibility Fix

Game-specific CPU throttle presets for 200+ classic DOS and Windows games. Find your game, apply the preset, and play at the intended speed.

18 games found

Grim Fandango

1998AdventureLucasArtsDOS/Win95

Issue: Runs too fast, characters move at double speed

Fix: Set CPU to 15% speed. Use ScummVM for best results.

15%
CPU Speed
Apply Preset

Fallout 2

1998RPGBlack IsleWin95/98

Issue: Movement and animations run at 2-3x normal speed

Fix: 20% throttle restores correct movement speed. Also try the Fallout 2 Restoration Project mod.

20%
CPU Speed
Apply Preset

Commandos: Behind Enemy Lines

1998StrategyPyro StudiosWin95/98

Issue: Game runs too fast, impossible to manage units

Fix: 25% throttle. Alternatively use DxWnd for compatibility.

25%
CPU Speed
Apply Preset

Indiana Jones and the Infernal Machine

1999ActionLucasArtsWin98

Issue: Physics and movement too fast

Fix: 30% throttle recommended. Run in Win98 compatibility mode.

30%
CPU Speed
Apply Preset

Jedi Knight: Dark Forces II

1997FPSLucasArtsWin95

Issue: Physics glitches, elevator speeds broken

Fix: 20% throttle fixes elevator and physics bugs.

20%
CPU Speed
Apply Preset

Baldur's Gate

1998RPGBioWareWin95/98

Issue: Animations too fast, combat speed broken

Fix: 35% throttle. BGTutu or EasyTutu mods also help.

35%
CPU Speed
Apply Preset

Diablo

1996Action RPGBlizzardWin95

Issue: Game runs at 3-4x speed, unplayable

Fix: 15% throttle. DevilutionX is a better long-term fix.

15%
CPU Speed
Apply Preset

StarCraft

1998RTSBlizzardWin95/98

Issue: Unit movement and build times too fast

Fix: 40% throttle. Modern patches from Blizzard also fix this.

40%
CPU Speed
Apply Preset

Age of Empires

1997RTSEnsembleWin95/98

Issue: Units move too fast, resource gathering broken

Fix: 30% throttle. Age of Empires Definitive Edition is the modern fix.

30%
CPU Speed
Apply Preset

Quake

1996FPSid SoftwareDOS/Win95

Issue: Physics and movement too fast

Fix: 25% throttle. Quakespasm or vkQuake are better alternatives.

25%
CPU Speed
Apply Preset

Doom / Doom II

1993FPSid SoftwareDOS

Issue: Runs at extreme speed, completely unplayable

Fix: 10% throttle. GZDoom or Crispy Doom are the recommended modern ports.

10%
CPU Speed
Apply Preset

Theme Hospital

1997SimulationBullfrogWin95

Issue: Simulation runs too fast, patients walk at sprint speed

Fix: 35% throttle. CorsixTH is an open-source remake.

35%
CPU Speed
Apply Preset

Dungeon Keeper

1997StrategyBullfrogWin95

Issue: Game speed too fast

Fix: 30% throttle. KeeperFX is the recommended modern fix.

30%
CPU Speed
Apply Preset

Warcraft II

1995RTSBlizzardDOS/Win95

Issue: Units move too fast

Fix: 20% throttle. DOSBox also works well for this title.

20%
CPU Speed
Apply Preset

Caesar III

1998City BuilderSierraWin95/98

Issue: Simulation runs too fast

Fix: 35% throttle. Augustus (open-source port) is the modern fix.

35%
CPU Speed
Apply Preset

Pharaoh

1999City BuilderImpressionsWin98

Issue: Walker speeds too fast

Fix: 35% throttle. Pharaoh: A New Era (2023 remake) is the modern solution.

35%
CPU Speed
Apply Preset

Planescape: Torment

1999RPGBlack IsleWin98

Issue: Animations run too fast

Fix: 40% throttle. Enhanced Edition on GOG/Steam is the recommended fix.

40%
CPU Speed
Apply Preset

Homeworld

1999RTSRelicWin98

Issue: Ship movement too fast

Fix: 45% throttle. Homeworld Remastered is the modern fix.

45%
CPU Speed
Apply Preset

The Retro Gaming CPU Problem Explained

The retro gaming market is valued at $3.8 billion globally in 2025, with 26.7 million active retro gamers in the US alone. A significant portion of these players are running classic DOS and Windows 95/98 games on modern hardware — and running into the CPU speed problem.

Games from this era used CPU cycles directly for timing. A game designed for a 100 MHz Pentium will run 40–50x too fast on a modern 4 GHz CPU. The original CPUKiller software solved this by consuming CPU cycles with a busy-wait loop, and this browser-based version does the same.

For the best long-term experience, consider DOSBox for DOS games, PCem or 86Box for full PC emulation, or the community-maintained ports listed in the fix notes above.