Here is a list of many of the tours and tour dates that Amen have done, along with a list of other bands on those dates. It is not a full list and I will update it:

1999

Amen's tour dates (US tour) with Machine Head, Coal Chamber and Slipknot (date - venue - city):

August 19 - Deep Ellum Live - Dallas, TX
August 20 - Tower Theater - Oklahoma City, OK
August 21 - Riverport Amphitheater - Maryland Heights, MO
August 22 - Roy Wilkins Auditorium - St. Paul, MN
August 23 - Royal Grove - Lincoln, NE
August 25 - The Rave - Milwaukee, WI
August 27 - City Market - Kansas City, MO
August 28 - Mohawk Park - Tulsa, OK
August 29 - Midnight Rodeo - Amarillo, TX
August 31 - Liquid 2000 - Lubbock, TX
September 1 - OZ - Killeen, TX
September 4 - Malibu - Shreveport, LA
September 7 - Riviera - Chicago, IL

More US tourdates:

September 8 - Headliners - Madison, WI
September 9 - Orbit Room - Cleveland, OH
September 10 - Harpo's Theatre - Detroit, MI
September 11 - Nautica Stage - Cleveland, OH
September 12 - Al Rose - Columbus, OH
September 14 - Roseland - New York, NY
September 15 - Webster Theatre - Hartford, CT
September 16 - Tink's - Scranton, PA cancelled
September 17 - Electric Factory - Philadelphia, PA
September 18 - Asbury Park Conv. Center - Asbury Park, NJ
September 20 - 9:30 Club - Washington, DC
September 22 - Ware House - Toronto, ON
September 23 - Le Spectrum De Montreal - Montreal, ON

More US tourdates with Coal Chamber, Machine Head and Slipknot:

September 24 - Civic Center - Lewiston, ME
September 25 - Lupo's - Providence, RI
September 27 - Ground Zero - Spartanburg, SC
September 28 - Masquerade - Atlanta, GA
September 29 - Masquerade - Tampa, FL
October 1 - House Of Blues - Lake Buena Vista, FL
October 3 - Chilli Pepper - Fort Lauderdale, FL

"Nothing Tour" - more Amen tour dates for the US, with Coal Chamber, Slipknot and Dope:

October 8 - Sam Boyd Complex - Las Vegas, NV
October 11 - Cloverdale Citrus Fair - Cloverdale, CA
October 13 - Sunshine Theatre - Albuquerque, NM
October 15 - Ogden Theatre - Denver, CO
October 17 - Super Toad Ent Center - Des Moines, IA
October 18 - The Beaumont Club - Kansas City, MO
October 19 - Pop's - Sauget, IL
October 20 - The Cotillion - Wichita, KS
October 21 - The Back Room - Austin, TX
October 30 - Coca Cola Starplex Ampitheatre - Dallas, TX (cancelled)
October 31 - The Brady Theater - Tulsa, OK (cancelled)
November 9 - DV8-WA, Seattle, WA (cancelled)
November 10 - Roseland Theatre - Portland, OR (cancelled)

European Tour with Machine Head (cancelled):

November 30 - 013 - Tilburg, Netherlands
December 1 - Vega - Copenhagen, Denmark
December 2 - Cirkus - Stockholm, Sweden
December 4 - Kulturbolaget - Malmo, Sweden December 8 - Docks - Hamburg, Germany
December 9 - Ancienne Belgique - Brussels, Belgium Decemebr 10 - Kick - Herford, Germany
December 11 - Live Music Halle - Cologne, Germany December 13 - Newport Centre - Newport, Wales December 14 - Civic Hall - Wolverhampton, England December 15 - Barrowlands - Glasgow, Scotland December 16 - Academy - Manchester, England December 18 - Rock City - Nottingham, England December 19 - Brixton Academy - London, England December 21 - La Laterie - Strasbourg, France December 22 - Le Zenith - Paris, France

2000

Tattoo The Earth Tour 2000, with Slipknot, One Minute Silence, (hed)p.e., Sevendust, Slayer, Sepultura, Nashville Pussy, Nothingface, The Workhorse Movement, Downset, Mudvayne, Famous, Systematic, Hatebreed, Professional Murder Music, Full Devil Jacket and Relative Ash:

July 15 - Portland, OR - Portland Meadows (Feat. Stone Temple Pilots)
July 18 - Lawrence, KS - Burcham Park
July 20 - East Rutherford, NJ - Giants Stadium (Feat. Metallica)
July 21 - Scranton, PA - Montage Mountain
July 22 - Boston, MA - Suffolk Downs
July 24 - Cleveland, OH - The Stage At Nautice
July 26 - Chicago, IL - The World Dome
July 27 - Des Moines, IA - Waterworks Park
July 28 - Somerset, WI - Floatrite Amphitheatre
July 29 - Milwaukee, WI - The Rave Complex
July 30 - Pontiac, MI - Phoenix Plaza Parking
August 2 - San Antonio, TX - Far West
August 4 - Mercedes, TX - Mercedes Showgrounds
August 5 - Houston, TX - Pasadena Fairgrounds
August 6 - Dallas, TX - Fair Park Coliseum
August 10 - Denver, CO - Red Rocks
August 12 - San Bernadino, CA - Orange Pavilion
August 13 - Phoenix, AZ - Mazanita Speedway

European tour dates:

August 22 - London, UK - signing at the Virgin Megastore, London Oxford Street, London
August 25 - Pukkelpop Festival, Belgium
August 26 - Lowlands Festival - Holland
August 28 - Leeds, UK
August 29 - London, UK – Virgin Megastore, London Oxford Street
August 30 - Dublin, IRE - The Point, supporting Slipknot (cancelled)
August 31 - London, UK - Garage

US tour with Nothingface:

September 8 - Cleveland, OH - Agora Ballroom
September 9 - Detroit, MI - Harpo's
September 10 - Chicago, IL - Metro (featuring The Workhouse Movement and From Zero)
September 11 - St. Louis, MO - Creepy Crawl (featuring The Workhorse Movement)
September 12 - Milwaukee, WI - The Rave Bar
September 14 - Cohoes, NY - Saratoga Winners
September 15 - Portland, ME - The Asylum (featuring The Workhouse Movement)
September 16 - Worcester, MA - Palladium (featuring Mudvayne, Relative Ash, Factory 81, The Workhorse Movement and One Minute Silence)
September 17 - Old Bridge, NJ - Birch Hill (featuring Mudvayne, Relative Ash, Factory 81, The Workhorse Movement and One Minute Silence)
September 19 - Richmond, VA - Alley Katz
September 21 - Raleigh, NC - Brewery NC
September 22 - Charlotte, NC - Tremont Music Hall
September 23 - Winston-Salem, NC - Ziggy's
September 24 - Atlanta, GA - The Masquerade
September 25 - Orlando, FL - Sapphire Supper Club (featuring Endo)
September 27 - Houston, TX - Fitzgerald's
September 28  - Austin, TX - Metro
September 29  - Dallas, TX - Galaxy
September 30  - Lubbock, TX - Liquid
October 2 - Denver, CO - Bluebird Theatre
October 3 - Las Vegas, NV - Sanctuary
October 4 - Las Vegas, NV - Sanctuary
October 5/6 - video shoot for The Price Of Reality with director Dean Karr
October 6 - Los Angeles, CA - Whisky
October 7 - Sacramento, CA - Bojangle's
October 8 - San Francisco, CA - Maritime Hall
October 11 - Minneapolis, MN - 400 Bar
October 12 - Des Moines, IA - Hairy Mairy's
October 13 - Grand Rapids, MI - The Intersection
October 14 - Cinncinnati, OH - Bogart's Front Room
October 15 - Madison, WI - Barrymore's
October 18 - New York, NY - The World Pre-CMJ Show
October 19 - Scranton, PA - Tink's 171H, 191H

US tour with Slipknot (cancelled):

September 27 - New Orleans, LA -The State Palace Theatre
September 28 - Pensacola, FL - Bayfront Auditorium September 29 - Lake Buena Vista, FL - House of Blues
September 30 - Tampa, FL - Entertainment Hall October 1 - North Myrtle Beach, SC - House of Blues October 3 - Nashville, TN - Nashville Municipal Auditorium
October 4 - Knoxville, TN - Knoxville Civic Coliseum October 5 - Charlotte, NC - Grady Cole Center October 6 - Atlanta, GA - International Ballroom

US tour supporting GWAR:

October 20 - Old Bridge, NJ - Birch Hill
October 21 - Worcester, MA - The Palladium
October 22 - New Haven, CT - Toad's Place
October 24 - Columbus, OH - Newport Music Hall
October 25 - Huntington, WV - Empire Club
October 26 - Cincinnati, OH - Bogart's
October 27 - Cleveland, OH - Agora Theatre
October 28 - Detroit, MI - Harpo's
October 29 - Chicago, IL - Vic Theatre
October 31 - Washington, DC - 9:30 Club
November 1 - tba
November 2 - Baltimore, MD - Recher Theatre
November 3 - Philadelphia, PA - Electric Factory
November 4 - Poughkeepsie, NY - The Chance

European Tour: